OSTREA. 
a brow ie lower valve is a little more convex; ears 
winked ne mae with oblique ftriz 
IMBRICATA. ell nearly equivalve, with nine unequal 
rays abe with ie It is found on the fhores of the 
Red fea, and refembles the lait. ‘The colour of the fhell is 
whitifh with purple {pots, and a little crenate at the margin; 
the rays alternately larger. 
The 
Shell nearly equivalve, with fix convex {moothith 
rays, and ftriate acrofs. It inhabits India, is about one inch 
white {potted with brown, or red {potted with white ; the 
tranfver 7 ftriz are placed at a diftance from each other. 
CREN Shell roundifh with convex rays, the outer 
oncs cay ftriate eel ay ep margin deepl¥ crenate. 
The ears are tranfverfely ftria 
* Srnuosa. Shell ovate a ery numerous and fine 
{trie ; th margin crenate oo Tt inhabits the Britifh 
feas ; oo = with faffr 
OSA. ell iene with fcaly rays, the inter- 
ices eae and marked with perpendicular ftrie. The 
fhell is varied with angular lines and fpots; ears wrinkled 
perpendicular, 
Dusia roundifh, with eighteen rays imbricate 
The “thell is nearly half an inch longs; ears 
fri ied eaiigas 
* Suprura. Shell with tweaty fmooth rays, the inter 
ay sranfverdely ftriate ; margin crenate. 
figured in Donovan’s Britifh Shells. 
Britith fhores, and is about two inches long, and two inches 
Versicotor. Shell orale with epee {mooth 
rays, the interftices cancellat The fhell is of a pale 
en white, fea-green, blackith, or red; ears ante 
ate. 
Rosea. Shell roundifh, _with five rays. The fhell is 
rays, or yreen, mixed with 
yellowifh, lurid, as Pilg Sty with livid rays. 
F ‘ 
> flat 
wards the hinge. s the Indian fea. a 
white within; lower aes convex, upper valve 
Tenuis. Shell thin, flat, purple, with v an minute 
A ae ftrize otng circular tranfverfe ones; within 
-the ftriz are elevat 
UTEA. Shell os, pale yellow, with thick rays. 
Muricata. Shel! roundifh and white, with a mixture 
of faffron; the rays convex, and very finely and fharply 
muricate 
ConspersA. Shell roundifh, tawny, dotted with white 
and black ; the rays are thic 
Noputosa. Shell poundie. brown, with black tranf- 
verfe lines and dots; the rays are convex and knotty. 
Raprata. The fhell of this ues is ua ; the colour 
is eee rolys with white ftripes; the rays convex. 
TAT hell o gen "Pl yellow, yee with 
eee varied with w and brown} the rays are 
The fhell is bear as inches long; ears can- 
ACULEATA. 
tifh; in form it is rather roundifh ; 
vith aculeate {cales. 
Prana. Shell thin, flat, white, with a faffron hinge; 
the rays are round and broad. 
The fhell is thin, varied with rofy and 
the rays are thick, 
rays that difappear to- _ 
fhell is “ti 
Shell oe red, and very minutely ftriate. 
vex on each fide, and yellowifh 
PusiLya. 
Fravescens. Shell c 
within ; the rays are conv 
FaBELLUM. re 7 round, — red, sel a white 
hinge, and a few rays are {moot 
SPONDYLADES. Shell glabrous ee ; the ears are equal. 
VIOLACEA Shell flattifh on each fi ey 
A Shell roundifh, plaited, and very finely 
ftriate joe saeeaae with a white eee Vaal to- 
st 
“Shell purple within; without with alternate 
brown and red bands; the rays are convex. 
seis white, with Cosi nt red {pots; the 
rays rough; onvex valve with alone crifp lamellz. 
The fhell of this ne is about an inch and a half long, 
and the fame in breadth. 
INFLAT Shell convex on each fide, clofed, oblong, 
pellucid, with thirty-two rays. ‘This is a very rare Berit 
is ochraceous, thin, aa twice as long as it 1s broad. 
b. Ears unequal, one of them generally ciliate, with fpines 
within. 
Species. 
Paxtium; Ducal Mantle. Shell equivalve, with twelve 
mbri 
The fhell is folid, red, varied with brown and white; ears 
one of them longer; margin of 
ell equivalve, with nme thick ob- 
tufe rays; the interftices pu aeu ed riate, tuberculate, 
prickly. It is found in the Red ; refembles the laft. 
The fhell 1s white, with fanguineous ee ; the margin with 
the border purplifh; ears with tranfverfe 
Shell equivalve, pale yellow, with tawny 
pots; twelve rays thick and fla'tifh; ears white, with dull 
ferruginous marks, and tran{verfe icaly ribs. 
ODOSA. Shell with nine Biss covered with apparently 
veficular tubercles. ‘here are three varieties. ‘They 
and whire, mixed with yellow ; 
more convex than the lower; the ear is {pinous within and 
beneath. 
Pes FEtis. 
the ears te fmall, Itis foun 
Shell with nine — rough rays; one of 
the fhores of Africa; 18 
{mall, thin, pellucid, gee nlly. ok oo {potted 
and veined 3 within glabrous white, with {ub ndulate rays 
and crenate “ on the margin; the ears an tranfverfe 
knotty ftriz 
PELLUCE Shell nearly equivalve, with nine eh 
NS. 
{mooth, with {poon-like Haheeey alpar {cales on the low 
valve. It inhabits the African feas; is ovate, tae. ek 
lucid, glabrous, white ; the aoe valve {potted with red. 
OxLiTERATA. Shell fmooth on the outfide, with twenty- 
four doubled rays. It inhabits the Indian ocean. e 
fhell is marked with very fine decuifate ttria; the lower 
valve pale reddifh _ iia at the hinge; upper valve 
auiehe ie or pale taw 
SANGUENEA. Shell “equivalve, with twenty-two rough 
poh ; Tie ears are fmall. I a ts the papas ae 
Atlantic, and American fease e fhell i und and 
picts red, fcearlet, or tawny ; ie ace Veet the 
longitudinally ftriate. 
rays are ong $n y * VARIA 
