[SMITHSONIAN MISCELLANEOUS COLLECTIONS.] 



CHECK LIST 



SHELLS OF NORTH AMERICA. 



WEST COAST; 



MEXICAN AND PANAMIC PROVINCE. 



BY 



P. P. CARPEBfTER. 



The West Tropical fauna of America is known to extend from Gnayraas 

 in the Gulf of California, to the shores of Ecuador and Peru; and includes 

 the Galapagos Islands. This list contains the Panama Shells of Prof C. 

 B. Adams; the Mazatlan Shells of the British Museum Catalogue; the 

 species from various sources enumerated in the " Report on the Present 

 State of our Knowledge of the Molluska of the West Coast of N. America," 

 — British Association, 1856, pp. 289 et seq.; and a few since discovered. 

 The synonyms, stragglers from other faunas, and the insular and South 

 American species are omitted. Being prepared simply for the interchange 

 of named specimens, it should not be cited as an authority. 



RRYOZOA. 



ItleinbraiiiporidaB. 



1. Membranipora denticulata, B. 



2. Membranipora gothica, Ei/l. 



3. Lepralia adpressa, Busk. 



4. Lepralia atrofusca, Ryl. 



5. Lepralia hippocrepis, Busk. 



6. Lepralia humilis, Busk. 



7. Lepralia marginipora, Reuss. 



8. Lepralia mazatlanica, Busk. 



9. Lepralia rostrata, Busk. 



10. Lepralia trispinosa, Johnst. 



C'ellepoi'idie. 



11. Cellepora cyclostoma, Busk. 



12. Cellepora papillae formis, Busk. 



Discoporidae. 



13. Defrancia intricata, Busk. 



14. Discina Cumingii, Brad. 



rAMEtEIBRAXCIIIATA. 



Plioladidae. 



15. Pholas cornea. 



16. Pholas crucigera, Sbi/. 



17. Pholadidea curta, Sf>i/. 



18. Pholadidea melanur*, Sb_)/. 



19. Pholadidea tubifera, Sbj. 



20. Parapholas acuminata, Sbi/. 



21. Parapholas calva, Gray. 



22. Martesia intercalata, Cpr. 



23. Martesia xylophaga, Val. 



Ciiastrocliiiieiiidae. 



24. Gastrochaena ovata, Sby. 



25. Gastrochaena truncata, Sb>/. 



Saxiciividae. 

 2G. Saxicava ?arctica, Linn. 



Coi'biilidae. 

 27. Sphaenia fragilis, Cpr. 

 2S. Potamomya aequalis, C. B. Ad. 

 29. Potamomya inflata, C. B. Ad. 



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