ON MOLLTJSCA OF THE WEST COAST OF NORTH AMERICA. 667 



Chione piUicaria, Sby., var.,= V, IHnacatensis, Sloat MS. Sculpture pressed 



smooth in the middle. 

 Cardium elatxim. Fine. 

 Cardium procei-um. Fine. 



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

 Modiola Srasiliensis. (Typical.) 

 JByssoarca Pacifica. 



Ostrea conchaphila et amara, Maz. Oat. 215. 

 Cliiton (JLophyriM) Stokesii. Also San Salvador, Ccqit. Dow. 

 Callopomajiuctuatum. 

 JBivoiiia contorta. 

 Turritella goniostoma. 



TurriteUa tigrina (light \&T.),= leiicostoma, Val. 

 Cerithidea albonodosa. Common. [Prohahly a var. of Mci::atlamca.] 

 Strombus gracilior. Also Mulege Bay. 

 Nevej-ita jRechziana. [Operc. strong, horny.] 

 JSanella triquetra. [Operc. sub-Buccinoid, oval ; nucleus iaternal, near middle 



of labrum ; scar -with few ridges, as in Purpura.~\ 

 Oliva angulata. Not rare. 

 Oliva Ciimingii, very callous var. 

 Agaronia testacea. ■\- 



Monoceros luguhre. Very tall var. 

 Phyllonotus nigritus. Veiy large, of form described by Philippi, -with Pholads 



in situ. Agiobampo Ba}'. 

 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 semilamellosa. Agiobampo Bay. 



Zazaria pectunculus (teste Cuming), ^t. Luis Bay. 



Cardium consors. St. Luis Bay. 



Avimda Peruviana. Mulege Bay. 



Lucina tigerrina. Very fine. San Marcos Island. 



Margaritiphora fimhriata. " Topo." 



Janira dentata \_—excavata, Val.]i "Caballito del mar," St. Luis Bay. 



Bulla nebidosa. " Huevitos." 



Glyphis incegualis. St. Luis Bay. 



Crucibtdum imbricatum. St. Luis Bay. 



Cyprcea exanthema. (Large.) Cape de Haro. 



Myurella variegata. Mulege Bay. 



Solarium granvlatum et var. quadriceps. Agiobampo Bay. 



Polinices bifasciata. Angeles Bay. 



Cyprtscassis tenuis [= Marsence, Kien.]. Carmen Island. 



Harpa erenata. very fine. Mulege Bay. 



Bezoardica abbreviata. Mulege Bay. 



Ficula decussata. Angeles Bay. 



Pyrula patula. Agiobampo Bay. 



Malea ringens. Lobos Island. 



Argonauta hians. 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, " Peeten pyxidatus" l?^svicrenatus, jun.). Also from the 

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

 Cumingl. On comparing these lists with the shells given in B. A. Rep. 

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

 species), it wiU 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 Jlactif raj. i, 



153 



