28 O S T 
forty-eight ftriae within. It is found on the (hores of 
South America, and is very rare. The fhell is nearly 
three inches long, and about as broad. 
8. Oftrea Japonica: (hell equivalve, a little convex, 
margined with yellow; upper valve with faint lines 
eroding concentric tranfverfe bands, and forty elevated 
llrise within. It is found on the diores of Guinea and 
Japan ; is about five inches and a half long and broad, and 
refembles the O. pleuronedtes, but is coarfer and thicker. 
9. Oftrea Magellanica: (hell equivalve, glabrous, with 
oblong crowded ftrise. It is found in the ftraits of 
Magellan : it refembles the O. pleuronedtes. The (hell 
is lateritious, not radiate, quite fmooth within; upper 
valve more convex ; lower valve flatter than in moft 
others, the ears are tranfverfely ftriate. 
10. Oftrea hybrida : fliell with nine or ten rays, the 
interftices longitudinally ftriate ; margin repand within. 
It inhabits the Norway fleas ; thin, lower valve white, 
upper valve flanguineous, with angular veins and lines. 
11. Oftrea radula: fliell nearly equivalve, wdth twelve 
convex rays crofted by crenate (trite. It is found in the 
Indian Ocean ; is three inches and a quarter long, and 
two and a half broad. The fhell is.oblong, white, or 
varied with white and brown ; the lower valve is a little 
snore convex; ears wrinkled, and furrowed with oblique 
(trite. 
12. Oftrea imbricata : fliell nearly equivalve, with nine 
unequal rays, imbricate with fleales. It is found on the 
fhores of the Red Sea ; and refembles the preceding. The 
colour of the (hell is whitifli with purple fpots, and a little 
crenate at the margin ; the rays alternately larger. 
13. Oftrea fubrotunda: fliell roundifh, with eight con¬ 
vex chefnut rays ; ears roundifh, white with a yellowifh 
border. The fliell is one inch and a half long, and two 
inches broad. 
14. Oftrea plica: (hell nearly equivalve, with fix con¬ 
vex fmoothifli rays, and ftriate acrofs. It inhabits India ; 
is about one inch and a quarter long, and an inch broad. 
The fliell is white, or white fpotted with brown, or red 
fpotted with white; the tranfverfe ftrite are placed at a 
diftance from each other. 
15. Oftrea crenata: fliell roundifti with convex rays, 
the outer ones finely ftriate longitudinally ; margin deeply 
crenate. The ears are tranfverfely ftriate. 
16. Oftrea finuofa : (hell ovate, with very numerous 
and fine ftrise; the margin crenate within. It inhabits 
the Britifli fleas ; fliell varied with faffron. 
17. Oftrea fquammofa : (hell oblong, with fcaly rays, 
the interftices broader, and marked with perpendicular 
ftrise. The (hell is varied with angular lines and fpots ; 
ears wrinkled, perpendicular. 
18. Oftrea dubia: fliell roundifh, with eighteen rays 
imbricate with flcales. The fliell is nearly half an inch 
long; ears ftriate tranfverfely. 
19. Oftrea fubrufa : fliell with twenty fmooth rays, the 
interftices tranfverfely ftriate ; margin crenate. This is 
deferibed and figured in Donovan’s Britifli Shells. It is 
found on the Britifli fliores, and is about two inches long, 
and two inches broad. See figs. 3, 4. 
ao. Oftrea verficolor: (hell flattened, with eighteen 
fmooth rays, the interftices cancellate. The fliell is of 
a pale-yellow, white, fea-green, blackifli, or red ; ears 
tranfverfely ftriate. 
21. Oftrea rofea : fliell roundifh, with five rays. The 
fliell is middle-fized, rofy, with white rays, or green, 
mixed with yellowifti, lurid, and leek-green, with livid rays. 
22. Oftrea fufea: fliell brown, with flat rays that dif- 
appear towards the hinge. It inhabits the Indian Sea. 
The (hell is white within; lower valve convex, upper 
valve flat. 
23. Oftrea tenuis; fliell thin, flat, purple, with very 
minute perpendicular (tripe crofting circular tranfverfe 
ones ; within the ftrite are elevated. 
24. Oftrea lutea: (hell thin, pale-yellow, with thick rays. 
35. Oftrea muricata; (hell roundifti and white, with a 
REA. 
mixture of faffron ; the rays convex, and very finely and 
fharply muricate. 
26. Oftrea confperfa: fhell roundifli, tawny, dotted 
with white and black; the rays are thick. 
27. Oftrea nodulofa : fliell roundifli, brown, with- black 
tranfverfe lines and dots ; the rays are convex and 
knotty. 
28. Oftrea radiata: friell thin; the colour is whitifh- 
rofy, with white (tripes ; the rays convex. 
29. Oftrea punftata : fliell oblong, pale-yellow fpotted 
with white ; beaks varied with white and brown ; the 
rays are crenate. The fliell is about two inches long; ears 
cancellate. 
30. Oftrea aculeata : fliell thin, varied with rofy and 
whitifli; in form it is rather roundifli ; the rays are thick, 
with aculeate feales. 
31. Oftrea plana: fliell thin, flat, white, wdth a faffron 
hinge ; the rays are round and broad. 
32. Oftrea pufilla : fliell oblong, red, and very minutely 
ftriate. 
33. Oftrea flavefeens: fliell convex on each fide, and 
yellowiih within ; the rays are convex. 
34. Oftrea fiabellum : fliell roundifli, deep-red, with a 
white hinge, and a few fpots. The rays are fmooth. 
35. Oftrea fpondylades: fliell glabrous-red, the ears 
equal. 
36. Oftrea violacea: fliell flattifhon each fide; tlieout- 
fide brown, the infide violet. It inhabits the Mediter¬ 
ranean. 
37. Oftrea aurantia : fliell roundifli, plaited, and very 
finely ftriate longitudinally, with a white femicircular 
band towards the hinge. 
38. Oftrea vittata : fliell purple within, without with 
alternate brown and red bands ; the rays are convex. 
39. Oftrea miniata : fliell white, with confluent red 
fpots ; the rays rough ; the convex valve with tranfverfe 
crifp lamellae. The fliell of this fpecies is about an inch 
and a half long, and the fame in breadth. 
40. Oftrea inflata : fliell convex on each fide, clofed, 
oblong, pellucid, with thirty-two rays. This is a very 
rare fpecies ; it is ochraceous, thin, and twice as long as 
it is broad. 
2. Ears unequal, one generally ciliate, with fpines within. 
41. Oftrea pallium ; the ducal mantle : fhell equivalve, 
with twelve convex rays; the feales are ftriate, rough, 
and imbricate. There are three varieties. They are found 
in India. The fhell is folid, red, varied with brown and 
white 5 ears ftriate, crenate, or fcaly, one of them longer ; 
margin of the (hell denticulate. 
42. Oftrea fanguinolenta : fliell equivalve, with nine 
thick obtule rays ; the interftices longitudinally ftriate, 
tuberculate, prickly. It is found in the Red Sea ; re¬ 
fembles the preceding. The fliell is white, with fangui- 
neous fpots; the margin with crenate plaits, the border 
purplilh ; ears with tranfverfe nodulous ftriae. 
43. Oftrea maculofa : fliell equivalve, pale-yellow, with 
tawny fpots ; twelve rays thick and flattifli; ears white, 
with dull ferruginous marks, and tranfverfe fcaiy ribs. 
44. Oftrea nodofa ; (hell with nine rays, covered with 
apparently-verficular tubercles. There are three varieties. 
They inhabit the American and African Oceans. The 
fliell is fometimes red or fcariet, fometimes varied with 
red and white, or tawny and white, mixed with yellow; 
the upper valve is more convex than the lower ; the ear is 
fpinous within and beneath. This is reprefented on the 
Conchologv Piate XV. fig. 2. vol. v. 
45. Oftrea pes felis, or cat’s-foot feallop : fliell with 
nine ftriate rough rays ; one of the ears very final]. It is 
found on the fhores of Africa ; is (mall, thin, pellucid, 
generally pale flefli-colour, (potted and veined ; within 
glabrous white, with lubundulate rays and crenate plaits 
on the margin ; the ears with tranfverfe knotty (trite. 
46. Oftrea pellucens: fliell nearly equivalve, with nine 
rays, fmooth, with fpoon-like hemifperical feales on the 
lower 
