A Conchological Manual by George Brettingham Sowerby (early reader books .txt) 📖
- Author: George Brettingham Sowerby
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Swainson and Mr. Gray being a comparative thinness in the outer lip.
BULINUS. Brug. (Bulinus, Lam.) _Fam._ Colimacea, Lam. Limacinea,
Bl.--_Descr._ Oval or oblong, light, covered with a thin epidermis;
spire obtuse, variable in length and in the number of whorls, which are
generally few; aperture wide, oval, rounded anteriorly; outer lip
simple, usually reflected, joining the columella without a sinus; inner
lip reflected over part of the body-whorl. The Bulini are land shells,
found in many parts of the world.--_Obs._ The genus Bulinus can only be
distinguished from Helix by its oval form; it forms part of the genus
Helix of De Ferrusac, under the sub-generic designation of Cochlostyla.
It is known from Achatina by the absence of the notch at the point of
union between the inner and the outer lips. The young are produced from
eggs, which are as firm and opaque as those of birds. (See
Introduction.) Bulinus rosaceus, fig. 282. B. Guadaloupensis, fig. 283.
Lionetianus, fig. 284. B. lubricus, fig. 285. Many new species werebrought to this country by Mr. Cuming, and are represented in the
Conchological Illustrations, published by the Author at 50, Great
Russell Street, Bloomsbury, (in parts 21, 22, 23, 26, 27, 30, 31, 34,
35, 137 to 146, 185, 186.) Species occur in Europe, West Indies,
Brazil, and South America generally. Some small species are British.
BULLA. Auct. _Fam._ "Bulléens," Lam. Akera, Bl.--_Descr._ Generally
thin, smooth, oval, oblong or cylindrical, more or less convolute;
spire short, depressed, or hidden by the last whorl; aperture long,
wide in front, gradually narrowing towards the spire; outer lip thin;
inner lip spread over a part of the last whorl.--_Obs._ The shells
composing this genus are very variable in form. The light horny species
with an elastic lip is called Akera, fig. 247. The more decidedly
convolute species with hidden spires are the Atys, Montf. B. Naucum,
fig. 250. B. Lignaria, fig. 251, is Scaphander of Leach. The light,
thin species, with extremely wide aperture, fig. 248, is Bullæa aperta,
Lam. The genus Bullinula of Dr. Beck, consists of those species which
have more produced spines, fig. 253. The Bullæ are marine, and inhabit
all climates. The fossil species occur in tertiary beds.
BULLÆA. Lam. BULLA aperta, Auct. fig. 248.
BULLÆANA. ("Bulléens, Lam.") A family belonging to the first section of
Lamarck's order, Gasteropoda, containing the genus Bulla. The genera
Bullæa, Akera, Aplustra, Atys, Scaphander, Bullinula, into which it has
been divided, may all be fairly included under the name BULLA.
BULLIA. Gray. A genus of shells partly resembling Buccinum, and Terebra
in general form, being more elongated than the former and more
ventricose than the latter. Mr. Gray remarks in the Synopsis of the
British Museum, page 114, that the Bulliæ resemble the Nassæ in most
characters, "but they have a very large, broad foot, and the hinder
part of the inner lip of the shell being extended beyond the mouth,
forms a raised enamelled band round the suture of the whorls, as is
also the case with the Ancillariæ and some Volutes." Bullia vittata,
fig. 427, is an example of the genus. The name Subula is given by De
Blainville to the other species of Terebra, so that if both these
genera were admitted, the old genus Terebra must be expunged.
BULLINULA. Beck. Species of BULLA, with produced conical spires, fig.
253.
BYSSOARCA. Sw. (_Byssus_ and _Arca_.) _Fam._ Arcacea, Lam. A genus of
bivalve shells, composed of the Arca _Noæ_, and several other species,
separated from the genus Arca on account of their shells being attached
by means of a byssus passing through an hiatus in the ventral margins.
_Noæ_, fig. 132. The species occur in Southern Europe, East and WestIndies, China; also, on the coasts of Great Britain.
BYSSOMYA. Cuvier. (_Byssus_ and _Mya_.) De Blainville states that
although the shell of this proposed genus resembles Saxicava, the
animal is sufficiently different to justify the separation.
BYSSUS. ([Greek: Bussos], _byssus_, ancient name for linen.) The
tendinous fibres by which some Bivalves are as it were anchored or
moored to sub-marine substances. A fine example of this is to be seen
in the Pinnæ which bear some resemblance to large Muscle Shells and
have an hiatus in the margins of the valves through which a bunch of
silken fibres passes. In the British Museum there is preserved a pair
of gloves which have been woven of these fibres. The Byssus is peculiar
to some bivalve shells such as Muscles, Hammer Oysters, Arca Noæ, &c.
CALCAR. Montf. (a spur.) A genus composed of TROCHUS STELLARIS, Lam.
and other depressed species of Trochus which are characterized by a
stellated keel round the angle of the last whorl; but not including T.
Imperialis, which is the genus Imperator, Montf. The difference
consists in the latter being umbilicated and the former not. T.
stellaris, fig. 358.
CALCAREOUS, (_calx_, lime.) A term applied to a shell or to its
operculum which is composed principally of lime or shelly matter, as is
usually the case, in distinction from one which is of an horny,
membranaceous texture. The greater number of shells are calcareous, but
it forms an important point of distinction with regard to the
operculum. The only difference between the genera Trochus and Turbo, as
at present established, depends upon the calcareous or shelly, and the
corneus or horny texture of the operculum.
CALCEOLA. _Fam._ Rudistes, Lam. and Bl.--_Descr._ Equilateral,
inequivalve, triangular; umbones separated by a large triangular disc
in the lower valve; cardinal margin straight, linear, dentated; lower
valve large, deep; upper valve flat, semi-orbicular, forming a kind of
operculum to the lower.--_Obs._ This singular shell, known only in a
fossil state, in the Palæozöic beds, is placed by Linnæus in the genus
Anomia. Lamarck places it among his Rudistes, but Mr. Sowerby in his
genera of Shells, states that it should be added to the family of
Brachiopoda. Fig. 194, 195. C. Sandalina.
CALLANTICA. Gray. POLLICIPES hispidus, Leach.
CALLIA. Gray? A genus described as having a peculiarly polished shell
like Pupina, but wanting the notch.
CALLISOSTOMA. Sw. A genus of shells separated from TROCHUS, and thus
described, "Imperforate; spire elevated, acute; aperture broader than
high, transversely ovate, hardly sinuated at the base, and slightly
oblique; shells always smooth, and often polished." C. zizyphina is
mentioned as an example.
CALLIRHOE. Montf. p. 362, vol. 2. Appears to be figured from the nut or
inner portion of a large Belemnite.
CALLISCAPHA. Gray? IRIDINA Nilotica, Sow. Zool. Journ. 1. pl. 2.
Separated from Iridina on account of the hinge margin being smooth.
CALLITHEA. Sw. A sub-genus of Mitræ, consisting of those species, which
like M. sanguisuga, have the "spire and aperture of nearly equal
length; internal channel nearly obsolete; shell with longitudinal
linear ribs, crossed by transverse striæ and bands; base contracted."
Swainson Mallac. Lard. Cyclop.
CALLOSITY. A term used in general zoology to express those hard horny
tumidities formed in the skin of some animals, (such as the Dromedary,
for instance) in those parts which are most frequently used. It is not
used in this sense by Conchologists, who apply it to those undefined
tumidities or bumps which appear on the inner surface and hinge of some
bivalve shells, and to the thickening over the umbilicus of Naticæ.
Glycimeris, fig. 67. Natica, fig. 327, 328.
CALPURNUS. Montf. OVULUM _verrucosum_, Auct. Distinguished by the small
circular tubercle at the back of each extremity of the shell. Fig. 441.
CALYPTRACEA. Lam. A family belonging to the first section of the order
Gasteropoda, Lam., the shells of which are described as always
external, covering the animal, and having no operculum. The genera
contained in this family may be thus distinguished.
CALYPTRÆA. Conical; apex central, septum spiral, cup-shaped, or
forked; including _Infundibulum_. Fig. 234 to 238.
CREPIDULA. Apex terminal; septum flat, reaching half across the
aperture. Fig. 239.
CAPULUS. Conical; apex obliquely curved, no septum. Fig. 240.
EMARGINULA. Apex curved backwards; a notch in the anterior
margin; including _Parmophorus_. Fig. 241, 242.
CEMORIA. A slit _near_ the apex. Fig. 244.
FISSURELLA. A slit _upon_ the apex. Fig. 245.
RIMULA. A slit near the margin. Fig. 243.
ANCYLUS. Apex curved sidewise. Fig. 246.
CALYPTRACEA. Bl. The second family of the order Scutibranchiata. Bl.
thus described: "Shell more or less conical, not spiral, or very
slightly so; aperture large and entire." The genera included in this
family are Crepidula, Calyptræa, Capulus, Hipponyx, and Notrêma.
CALYPTRÆA. Lam. _Fam._ Calyptracea, Lam. and Bl.--_Descr._ Conical,
patelliform, irregular, with an internal, lateral, salient plate or
septum, varying in form.--_Obs._ The internal appendage is in some
species cup-shaped, in some it juts out of the centre in a double
point; in others it is only a small flap; and in others a spiral disc.
These last, which are shaped like Trochus, are separated by De Montfort
under the appellation INFUNDIBULUM; TROCHATELLA, Sw. The Calyptræa may
be known from Crepidula by the septum, which in the latter is a flat
plate reaching half way across the cavity. Fig. 234, 5, 6.
CAMERINA. Brug. NUMMULITES, Auct.
CAMILLUS. Montf. A genus founded upon a minute spiral shell, with a
triangular aperture, turned over the back of the last whorl. It is
figured in Soldani's Testacea Microscopica.
CAMPULOTUS. Guettard. MAGILUS, Auct.
CANAL. A groove which characterizes some spiral univalves, where the
inner and outer lips unite at the front part of the aperture. This
canal is drawn out in some shells to a considerable length, in others
it is turned abruptly over the back. The family Canaliferæ, Lam. (fig.
372 to 401), are all provided with this canal.
CANALICULATED. Applied generally to any distinct groove or canal.
CANALIFERA. (_Canalifères_, Lam.) A family belonging to the order
Trachelipoda, Lam. nearly corresponding with the family Entomostomata
in De Blainville's system, and described as having a canal of greater
or less extent at the anterior part of the aperture. This canal is
sometimes straight, sometimes tortuous, and in some genera it is
recurved over the back of the shell. All the shells have an operculum,
and the thickness of the perfectly formed outer lip does not increase
with age. The Canalifera are characterized by having a canal, in
distinction from the Purpurifera, which have only a notch. This family
contains the following genera,
CERITHIUM. Club-shaped. Fig. 372.
POTAMIS. The same, fresh water. Fig. 377.
NERINEA. The same, with internal folds. Fig. 374.
TRIPHORA. Anterior and posterior canals closed so as to present
three openings. Fig. 375, 376.
TELESCOPIUM. Pyramidal, trochiform. Fig. 378.
PLEUROTOMA. A slit on the upper part of the outer lip; including
_Clavatula_. Fig. 379, 381.
TURBINELLA. Three horizontal folds on the columella. Fig. 382,
383.
SPIRILLUS. Spire papillary; one fold on the columella. Fig. 384.
CANCELLARIA. Three folds, and internal costæ. Fig. 385.
FASCIOLARIA. Oblique folds, the lowest the largest. Fig. 386.
FUSUS. Fusiform; no folds on the columella. Fig. 387.
PYRULA. Pear-shaped. Fig. 388 to 390.
STRUTHIOLARIA. Outer lip thickened; sinuated. Fig. 391.
RANELLA. Two rows of varices; a canal at each extremity of the
aperture. Fig. 393, 394.
MUREX. Three or more rows of varices; only one distinct canal.
Fig. 395, 396.
TYPHIS. A tubular perforation between each varix. Fig. 397.
TRITON. Varices not in rows. Fig. 398 to 401.
CANCELLARIA. Auct. (From _Cancellatus_, cross-barred, like window
frames or net work.) _Fam._ Canalifera, Lam. Entomostomata, Bl.--Descr.
Oval, thick, cancellated; spire generally short, pointed; aperture
sub-ovate, emarginated anteriorly, pointed at the posterior extremity;
outer lip marked within by transverse ridges; inner lip spread over
part of the body whorl, terminating in a straight, thick, obtuse
columella, with several strong oblique folds. _Hab._ Indian Ocean,
Coast of Africa, America, and West Indies. Fossils found in London Clay
and Calc-grossier of Paris. Differing from Turbinellus in form and in
the transversely ribbed inside of the outer lip. Fig. 315. C.
reticulata.--_Obs._ The latest enumeration of the species of this genus
is contained in a catalogue published by Mr. G. B. Sowerby, senior,
accompanying the author's figures of the new species, amounting to 38,
in parts 9 to 13 of the Conchological Illustrations. The greater part
of these new species were brought to this country by Mr. Cuming.
CANCELLATED. (From _Cancellatus_,
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