10 AURICULA; 
ASTARTE. Sow. (Name of a Sidonian goddess, Ashtaroth in 
scripture.) Fam. “ Nymphacea, Lam.’ Gen. Crassina, Lam. 
Descr. Suborbicular, equivalve, inequilateral, thick, compress- 
ed; h’nge with two solid diverging teeth in the right valve, one 
tooth and a slight posterior elevation in the left; muscular im- 
pressions, two in each valve, uniform, united by a simple palleal 
impression; ligament external. Obs. This genus differs from 
Venus, Cytherzea, &c. in not having a posterior sinus in the 
impression of the mantle. The hinge also differs in having 
but two cardinal teeth. Astarte differs from Crassatella, in 
having an external ligament. Nearly all the species known 
are British. The fossils occur in Crag, Lower Oolite, &c. Fig. 
110. A. Danmoniensis. 
ASTROLE’PAS. Klein. Coronuxa Testudinaria, Auct. Chelon- 
obia, Leach, fig. 15. 
ATLANTA. Lesueur. Fam. Pteropoda, Lam. and Bl. Deser. 
Spiral convolute, transparent, fragile, compressed; with a broad 
fimbriated dorsal keel, and a narrow aperture. This shell, 
which is called, “‘corne d’ammon vivant,”’ is found in the Atlantic. 
The smal] Pteropod, figured in Sowerby’s genera as Limacina, 
belongs to this genus. Atlanta Helicialis, fig. 220. 
ATRYPA. Min. Con. Spirirer, Sow. Fig. 203. A. Reticulata. 
ATTACHED. Shells are attached to marine substances in various 
ways; sometimes by a byssus, or bunch of silky fibres, passing 
through an opening between the valves, or a perforation in the 
shell, asin Mytilus and Orbicula; sometimes by a portion of the 
shell itself, asin Chama, Spondylus, Serpula, &c. and sometimes by 
a fleshy tendinous process called a pedicle, as in all the “ Pedun- 
culated Cirripedes,’”’ Lam. 
A’TYS. Montf. Generic name for those species of Buuua, de- 
scribed “as convolute, with the last whorl covering the rest 
and hiding the spire, the aperture rounded at both ends.’’ 
Bulla Naucum, Auct. fig. 250. 
AURICULA. Lam. (Dim, from Awris, an ear.) Fam. Auri- 
culacea, Bl. Colimacea, Lam. Deser. Oval or oblong, cylin- 
drical or conical, solid; aperture long, narrow, generally straight- 
ened in the centre, rounded at the base, with two or three strong 
folds on the inner lip, and the outer lip thickened, reflected or 
denticulated ; spire short, obtuse. Epidermis horny, brown. Obs. 
This description includes the A. Coniformis fig. 298, and seve- 
ral other conical species, with narrow apertures, which formed 
the genus Melampus, Mont. and Conovolus, Lam. and excludes the 
A. Dombeyana, Lam. fig. 300, and several similar species, which 
being more rotund, having thin outer lips, and but one fold on 
the columella, are described under the generic name Cxinina 
by Gray It appears rather doubtful whether the Auricule are 
marine or fluviatile, but the animals appear to be amphibious. 
