Tellina Cumingii, Hani. 



Gulf of California. 



Strigilla caniaria, Linn. 



San Juan del Sur, Nicaragua. 



Doiiax assiniilis, Hani. 



Panama, 



Trigona radiata, Sby. 



Caniien Island, Gulf of California. 



Dosiiiia Durikeri, Phil. 



Panauni. 



Dosiiiia ponderosa, Gray. 



Carmen Island, Gulf of California, 



Callista aurantia, Hani. 



Gulf of California. 



C'allista chiontiea, Mke. 



Carmen Island, Gulf of California. 



Tapes histrionica, Shy. 



Panama. 



Cardita affiuis, Brod. 



Panama. 



Cardita radiata, Brod. 



Panama. 



Codakia tigerina, Linn. 



Gulf of California. 



Liiciua muricata, Chemn. 



Gulf of Calilbrni;i. 



Liiciua eburnea, Rve. 



Gulf of California. 



Lucina undata, Cpr. 



Gulf of California. 



Periia C'liemnitzianus, IXOih. 



Panama. 



Janira dentata, Shjj. 



Gulf of California. 



Bulla Adamsi, Mke. 



Gulf of California. 



Siphonaria lecanium, Phil. 



Gulf of California. 



Siphonaria pica, Shtf. 



Gulf of California. 



Dentalium semipolitum, Cpr. 



Gulf of California. 



Callopoma fluctuosum, Mawf. 



Panama. 



C'allopoma saxosum. Wood. 



Panama. 



II vanilla inermis, Gmel. 



Panama. 



Calliostoma versicolor. Mke. 



Gulf of California. 



Tegula peilis-serpenti.s, WomL 



Panama. 



Omphalius ^'iridulus, Gmel. 



Panama. 



Nerita Bernliardi, PecL 



Panama. 



Nerita scabricosta, Lam. 



Panama. 



Neritina intermedia, Shy. 



Nicaragua. 



