422 



VENERIS. 



Sub-gen. ctrcomphalus, Kleiu (Clausina, Brown, Clausinella, 



Gray). 



Shell with the surface of the valves lamellose, the lamellae 

 membranaceous, or short and thickened. 



alta, Sow. 



Berrii, Gray. 



calcarea, Phil. 



calophylla, Hartley. 



chlorotica, Mice. 



Cumingii, Scnv. 



Cypria, Sow. 



decipiens, Hanley. 



discrepans, Sow. 



distans, Phil. 



dysera, Linn. 



elegans, Adams and Reeve. 



fasciata, Da Costa. 



foliacea, Phil. 

 gilva, Phil. 

 Isabellina, Phil. 

 Kelletii, Hinds. 

 lamellata, Lam. 

 Paphia, Linn. 

 Peruviana, Soiv. 

 puella, Phil. 

 retro versa, Desh. 

 roborata, Hanley. 

 tiara, Dillw. 

 varicosa, Sow. 

 Yatei, Gray. 



Sub-gen. timoclea, Leach. 

 Shell with the surface of the valves decussated. 



aspera, Quoy and Gaim. 

 australis, Sow. 

 cardioides, Lam. 

 discors, Soiv. 



fuscolineata, -Brorf. and Sow. 

 gallinula, Lam. 

 granulata, Gmel. 

 grata, Say. 



histrionica, Brod. and Soiv. 

 intersecta, Sow. 

 mitis, Desh. 

 pectoi'ina, Lam. 

 straminea, Sow. 

 subnodulosa, Hanley. 

 tessellata, Adams and Reeve. 

 undatella, Sow. 



Sub-gen. chamelea, Klein (Pectunculus, Da Costa, not Lam. 



Orthygia, Leach). 



Shell with the surface of the valves transversely striated. 



aphrodina, Desh. aphrodinoides, Lam. 



