OSTREA. 
130 
that the red color frequently diffuses itself over the surface, 
sometimes over the ribs of the flatter valve, and even on 
the inside. But the strongest evidence for their specific 
union, is the somewhat oblique outline equally observable 
in both, and which is more peculiarly distinguishable with* 
inside, or on the flatter valve, one end being more sloping 
from the ears, and the opposite end appearing as if it were 
more produced. 
On most sandy shores, v. v. 
t* 4. Ostrea varia. Prickly Scallop . 
Lister, pi. 180. f. 17, 181. f. 18, and pi. 189. f. 23— Pen¬ 
nant , pi. 64. f. 1— Da Costa, pi. 10. f. 1,2, 4, 5, 7, and 9— 
Donovan , pi. 1. f. 1— Dorset Cat. pi. 10. f. 1, 2, 4, 5, 7, 
and 9. 
Shell oblong, with about thirty rounded ribs, which are 
rough with concave spines, especially about the margin, 
both valves equally convex: color and markings variable 
like O. opercularis, but generally of a darker hue, some¬ 
times blackish purple marbled with yellowish white with 
the inside dark glossy purple, sometimes pale with a pink 
tinge, and rarely of an uniform white, pink, deep green or 
orange : ears very unequal ; the longest very much wrin¬ 
kled on the upper edge, the other edge striate and fringed 
with spines ; the lesser valves both striate and fringed: 
length two inches and a half; breadth two inches. 
Sandy shores, v. v. 
p 5. Ostrea sinuosa. Distorted Scallop. 
Lister , pi. 172. f. 9— Pennant, pi. 64. f. 2— Da Costa 
pi. 10. f. 3, 6— Dorset Cat. pi. 10. f. 3, 6. 
Pecten Pusio. Donovan, pi. 34. 
Shell oblong, sometimes nearly orbicular, more or less 
distorted on the surface and irregular at the margin, often 
very rough with spinous foliations, with numerous very 
fine ribs or lines, some oi them larger and slightly tubercled 
by transverse stria;: one ot the valves very convex and 
deformed by swellings and protuberances ; the other much 
Hatter and more even : color pink or brownish, or marbled 
with white : ears sometimes nearly equal and striate, 
often very unequal, and frequently hardly distinguishable; 
the 
