The Hiflory ej A N I M A L 8 , ij 9 
Chama truncata obfcure fafciata . 
The ohfcurely fafciated\ truncated Chama, 
This was one of the firft known fpecies of the truncated Chamas, and obtained 
very early, in thefe ft tidies, the name of Concha Veneris: it is now diftinguiftied by 
the name of the oriental Concha Veneris; but, in contradiction to the generality of ori¬ 
ental fpecies, it is vaftly inferior in beauty to the occidental Concha Veneris, or the 
fpinofe-lipped kind defcribed before : it is two inches and a half in length, and as much 
in diameter ; the head, where the hinge is placed, is fmall and rounded, and the 
truncated part is furnifhed with two lips, which are fo large, as to meet near the top* 
leaving only a fmall opening juft under the hinge, but they gape again lower down : 
the whole furface of the {hell is furnifhed with obfcure fafcite, eight or ten in number, 
and the lips are fmooth at the edge, or have no fpines, nor fo much as a dentated 
margin. 
It is frequent on the fhores of the Eaft Indies, but it is not greatly valued by our 
collectors. 
Chama truncata Icevis variegata . 
The fmooth , variegated , truncated Chama . 
This is a large and very beautiful fpecies ; it is two inches and a half in diameter, 
and more than two inches from the hinge to the oppofite edge; both the valves are 
gibbofe in a confiderable degree, and the truncated end is furnifhed with a pair of 
lips, which leave only a fmall, round aperture under the hinge : the furface of the 
whole fhell is perfectly fmooth, and has an excellent natural polifh : it’s ground colour 
is a fnowy white, and it is variegated with very elegant ftreaks and blotches of a vio¬ 
let purple. 
It is frequent in the American feas. 
Chama fuhorhiculata variegata Icevis, 
The fmooth , variegated , roundifo Chama . 
This is near two inches in diameter, and is not of the truncated kind ; the head is 
large, obtufe, and rounded, and both fhells are convex ; they fhut tolerably clofe, all 
the way round, except that they leave a fmall roundifh aperture near the head on one 
fide : the colour of the fhell is yellow, and it is elegantly variegated with red fpots; 
there is not the leaft ridge or furrow on any part of it’s furface, and it has a fine na¬ 
tural polifh. 
It is brought to us principally from the Eaft Indies, though we have it in fome parts 
of Europe. 
Chama rugofa fubrotunda capite oblongo . 
The roundijh , rugofe Chama , with an oblong head. 
This is an inch and a half in length, and about an inch and a quarter in diameter j 
it’s colour is a fimple brownifh-yellow, without any variegations: the valves are both 
confiderably gibbofe, and have a number of deep, tranfverfe furrows, with fome 
roughneffes and obtufe protuberances on the ridges between them : the head is elevated 
and elongated, and terminates in an obtufe point; this has as little beauty as any of 
the Chamas. 
It is a native of our own feas, and is alfo fometimes brought from America. 
Chama fuborbiculata prof unde Jlriata, 
The deeply flriated , fuborbiculate Chama . 
This is a fmall fpecies 5 it meafures about three quarters of an inch in diameter, 
and fomewhat lefs than that from the hinge to the oppofite verge: the colour is a to¬ 
lerably pure white, and it is variegated with elegant, blood-red fpots: the whole fur¬ 
face is ornamented with a kind of longitudinal ribs, running between deep and broad 
furrows 5 there are alfo fome tranfverfe lines, but they are much fainter. 
It 
