NORTH AMERICAN CONCHOLOGT. 



411 



Gould. — Catalogue of the Recent Shells, with descriptions of 

 the new species : by Augustus A. Gould, M. D. (From the 

 Reports of Explorations and Surveys to ascertain the most prac- 

 ticable and economical Route for a Railroad from the Missis- 

 sippi River to the Pacific Ocean, &c., by Lieut, R. S. William- 

 son, Top. Eng., vol. V. 33d Congress, 2d Session, Senate Ex. 

 Doc, No. IS, vol. xiii, pt. v. 4to. Washington, 1856. The 

 general title-page of the Report bears the date of 1853, that of 

 Part II, of which this paper forms an Appendix, bears the date 

 of 1857. Like all the Pacific Railroad Reports, it forms a 

 portion also of the House Documents.) 



No descriptions are given of the following : — 



Page. Jfame. 



330 Ostrea . 



330 Pecten monotimeria Conrad. 

 330 ventricosus Sowerhy. 



P. tumidus Sowerby. 

 330 Mytilus edulia. 

 330 Modiola capas Conrad. 

 330 Venus Nuttallii Conrad. 

 330 fluctifraga Sowerby. 



330 Tapes grata Say. 



T. discors Sowerby. 

 straminea Conrad. 

 330 gracilis Gould. 



330 Cyclas ? 



330 Cardium cruentatum Gould, 



330 Lucina orbella Gould. 



330 Nuttallii Conrad. 



330 Mesodesma rubrotincta? Sowerby. 



330 Tellina vicina Adams. 



330 secta Conrad. 



330 Sphaenia Californica Conrad. 



330 Petricola carditoides Conrad, 



P. cylindrucea Desh. 

 330 Solecurtus Californiensis Conrad. 

 330 Gnathodon Lecontei Conrad. 



G. trigonum Petit. 

 330 Lottia scabra Gould. 

 330 patina Esch. 



330 Scurria pallida Gr. 



Lotliu mitra Br. 



Locality. 

 San Diego. 

 San Diego. 

 San Diego. 



San Francisco. 

 San Diego. 

 San Pedro. 

 San Diego. 

 San Pedro. 



San Pedro. 



Colorado Desert. 



San Diego. 



San Pedro. 



Sau Pedro. 



San Pedro. 



San Diego. 



San Pedro. 



San Diego. 



Monterey, San Pedro. 



San Diego. 

 Colorado Desert. 



San Francisco. 

 San Pedro. 

 San Pedro. 



