[ 7 2 ] 
Vermicularia, Worm-fhells. Thefe are of a very 
irregular Shape, and are nothing but a kind of 
teflactoas Covering the Sea Worms inhabit. They 
are generally found in Clufters, often kicking to 
the Bottom of Ships after a long Voyage. 
We are now come to a Conclufion of our fmall 
Remarks on the Univalves, and muft in a regular 
Progrefiion proceed to take Notice of the Bivalves, 
with which the Remainder of this Table is filled: 
As to the Multivalves, we fhall pafs them over, as 
they are not yet exhibited. 
Oftrea , Oyfters. This Shell confifts of two 
Parts joined together by a Hinge, being a ftrong 
Membrane; one of the Parts of the Shell is raoft 
frequently fiat, the other moderately globular, and 
have circular Striae; but their general Form is va¬ 
rious, in the feveral Kinds. There are here pre¬ 
fer ved a great Variety of the fcarcer Sorts ; among 
the reft, the Thorny Oyfter, the Prickly Oyfter, 
the Hammer and Saddle Oyfters, of which fome 
have ;he Valves jo : ned in a Manner more particu¬ 
larly refembling a Hinge. There are alfo fome 
Specimens of tranfparent round fiat Oyfters, ufed 
in fome Part of,the Eaft Indies inftead of Glafs. 
Pe 5 lir.es , Scollop Shells. They are of a flatted 
Shape, and the Valve fhut clofe in all Parts. They 
differ from the Oyfter in that they are auriculated, 
and are ftriated in the Manner of a Comb, longi¬ 
tudinally. The moft curious of this Kind are the 
Mantle Scollops of various Colours, particularly the 
Ducal Mantle, the Marbled Scollop, the Coral 
Scollop, and others. 
Cardia , Heart-{hells. Both the Valves of this 
Shell are convex, and they are not auriculated, 
often confounded with the Peftines. Venus’s Heart, 
the Noah’s Ark, the Ox Heart, Human Hear?, 
thorny 
