ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 667 



Chione pulicaria, Sby., var.,= V. Pinacatensis, Sloat MS. Sculpture pressed 



smooth in the middle. 

 Cardium elatum. Fine. 

 Cardium procerum. Fine. 



Modiola capax. " Choros." Also Sta. Inez Bay. 

 Modiola Brasiliensis. (Typical.) 

 Byssoarca Paciftca. 



Ostrea conchaphila et amara, Maz. Cat. 215. 

 Chiton (Lophyrus) Stokesii. Also San Salvador, Capt. Dow. 

 Callopomajluctuatum. 

 Bivonia contorta. 

 Turritella goniostoma. 



Turritella tigrina (light var.),= leucostoma, Val. 



Cerithidea albonodosa. Common. [Probably a var. of Mc:zatlanica.~\ 

 Strombus gracilior. Also Mulege Bay. 

 Neverita Recluziana. [Operc. strong, horny.] 

 Manella triquetra. [Operc. sub-Buccinoid,*Wal ; nucleus internal, near middle 



of labrum ; scar with few ridges, as in Purpura."] 

 Oliva angidata. Not rare. 

 Oliva Cumingii, very callous var. 

 Agaronia testacea. 

 Monoceros lugubre. Very tall var. 

 Phyllonotus nigritus. Very large, of form described by Philippi, with Pholacls 



in situ. Agiobampo Bay. 

 Phyllonotus bicolor. [Operc. thin, without frills or raised layers ; of uniform 



colour.] Also Angeles Bay. 



To these may be added, from a second voyage by Capt. Stone to the 

 northern part of the Gulf of California, and in equally good condition 



Area grandis. Agiobampo Bay. 



Callista semilamettosa. Agiobampo Bay. 



Lazaria pectunculus (teste C uming). St. Luis Bay. 



Cardium consors. St. Luis Bay. 



Avicula Peruviana. Mulege Bay. 



Lucina tigerrina. Very fine. San Marcos Island. 



Margaritiphorajimbriata. u Topo." 



Janira dentata [_ excavataj Val.J. "Caballito del mar," St. Luis Bay. 



Sulla nebulosa. " Huevitos." 



Glyphis in&qualis. St. Luis Bay. 



Crucibulum imbricatum. St. Luis Bay. 



Cyprcea exanthema. (Large.) Cape de Haro. 



Myurella variegata. Mulege Bay. 



Solarium gramdatum et var. quadriceps. Agiobampo Bay. 



Polinices bifasciata. Angeles Bay. 



Cypracassis tennis [= Marsence, Kien.]. Carmeu Island. 



Harpa crenata. Very fine. Mulege Bay. 



Bezoardica abbreviata. Mulege Bay. 



Ficula decussata. Angeles Bay. 



Pynda patula. Agiobampo Bay. 



Malea ringens. Lobos Island. 



Argonauta Mans. 1 fine sp. Upper part of Gulf of California. 



To the Guaymas fauna must be added, from Dr. Gould's portion of the 

 same collection, " Pecten pyxidatus" [?=subcrenatus, jun.). Also from the 

 collection of the Calif. Ac. Nat. Sc., Nassa nodocinrtfi, A. Ad. [Galapagos, 

 Owning']. On comparing these lists with the shells given in B. A. Hep. 

 p. 352 (in which the Venus quoted is not " staminea, Conr.," but a southern 

 species), it will be seen that the fauna of the upper part of the Gulf, as fur 

 north as it has been explored, is essentially tropical. The Chione fltu 



153 



