ANOMI A. B 0 fFL-SHELL. 
3 
larly cut down the sides and leaving the front margin a 
mere obtuse point, rough on the outside but not irregular 
nor undulate, white with a tinge of pale purple: upper 
valve convex, slightly inflected both at the beak and front 
margin * beak a little projecting, and curved over the lower 
valve, which is rugged with a large perforation near the 
summit: length an inch and a quarter; breadth at the 
hinge an inch. 
This singular variety, if it he only a variety, we have 
found both in Dublin bay and the south of Devon ; and it may 
be remarked, that the oval perforation of the under valve 
points in an opposite direction to that of A. Ephippium. 
On most rocky coasts, v. v. 
i* 3. Anomia Squamula. Scaly Bowl-shell. 
Walker, f. 80 —Dorset Cat. pi. 13. f. 4. 
Shell rounded, smooth, regular and entire at the margin; 
the upper-valve nearly flat, with a small beak projecting 
beyond the margin, very thin, transparent, dirty white or 
horn color; inside silvery, or tinged with green; under 
valve extremely thin and filmy, like the scale of a fish, 
often wrinkled or ribbed and a little concave, perforated 
near the hinge : diameter about half an inch. 
We have found this shell full an inch in diameter, and 
with the surface quite smooth : on the ether baud we have 
the A. Ephippium from two-tenths of an inch to more than 
three inches in diameter, ali of them preserving the irre¬ 
gular undulations of the margin. These circumstances, to¬ 
gether with the different appearance of the beak, which 
always projects beyond the margin, make us consider it 
•as a distinct species. 
On stony or rocky coasts, v. v. 
4. Anomia Cepa. Onion-peel Bowl-shell. 
Shell with the upper-valve very convex or semiglobular, 
sometimes inclining to oval, very slightly wrinkled, of a 
glossy reddish-violet color, not unlike the coat of an onion; 
.lower-valve nearly flat, and perforated near the hinge; in¬ 
side glossy pale violet :< diameter about an inch. 
On the English and Irish coasts, v . m. 
b 2 5. Anomia 
m 
