59 
t I Crassina. Under the families of the Conchae, 
i- | are Cyclas, Cyrena, and the very rare shell Gala- 
■ ! taea radiata (Venus subviridis, GmeL), Cyprina 
e and part of the genus Cytheraea. 
Table 3. Cytheraeae, and part of the Vene- 
r | res ; containing several species of each genus. 
, Table 9. The remainder of the genus Ve- 
- nus, and the genus Venericardia, of which very 
. few species are known, except in the fossil state. 
The family of the Cardiacea, are also included 
> in this compartment, namely the genera Cardium, 
; j Cardita, Cypricardia (the two last were classed 
; by Linneus with the Chama) Hiatella (Mya of 
Linneus), and Xsocardia. The last genus includes 
the rare and elegant shell Isocardia Moltktiana 
•—the Chama Moltktiana of Gmelin. 
Table 10. The families Arcacea, Trigoni- 
i ana, and part of the Nayada. Amongst them 
are the Cucuilsea auriculifera (Area cucullus. 
GmeL), several species of the genera Area and 
Pectunculus, and the genus Nucula (the two 
. latter were confounded with the Areas, by Lin¬ 
neus); the genus Trigonia, and part of the genus 
Unio (Mya of Lin.), some species of which fur- 
i nish pearls of considerable size and beauty. 
Table 11 . Unio continued; and the ge¬ 
nera Hyria, Anadonta (Mytikis, Lin.), and a 
single valve of the Xridina exotica, a very rare 
genus, of which Lamarck gives but that one spe¬ 
ll cies. Also the families Chamacea, Tridacnea, 
and 
ROOM VIII. 
Nat. Hist. 
