PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



11 



(marked lo iu tbe list) from the material obtained in sinking a well* at 

 a distance of from ninety to one bnndred and sixty feet below tbe 

 surface of tbe earth, and not far from tbe present sea-level. Tbe matrix 

 is usually rather soft, composed of loosely aggrt'g^ited grains of sand 

 or fine sandy mud, occasionally hardened by intiltration of lime-bearing 

 water. 



In tbe accompanying list, those species found living (li) at tbe present 

 i\ay in tlie fauna of tbe Californian coast, between San Francisco and 

 San Diego, are marked L, those at present making part of the northern 

 or Oregouian fauna N, and those belonging to tbe fauna of Lower Cali- 

 fornia, the Gulf of California, Mexico, and Central America are marked 

 ►S. The extinct species (F) form a very small proportion of tbe whole, 

 as will be readily seen. 



7907 

 8 

 J) 



7910 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



7920 

 1 

 2 

 3 

 4 

 5 

 6 

 7 



,Q 



9 

 7930 

 1 

 2 

 3 

 4 

 5 

 fi 

 7 

 8 

 9 

 7940 

 1 



a 



3 

 4 

 .5 

 6 



7 

 8 

 9 

 7350 

 1 

 2 



Laqueits californicus (Koch) Dall . 



Fholadidca ovoidea Gld 



Corhula luieola Cpr 



Periploma arf/oiiaria Conr 



Soleciirtus cal>fo7-nianus Conr , 



Macoma stcta Coiir 



Alacoma indtntata Cpr 



Macoma nasuta Conr 



Macoma (like) s«t«/o8a Spengler . 



TeVina modesta Cpr 



TeUlna Bodegensis Hds 



Cumingia calif ornica Conr 



Donax Jlexuosus Gld 



Mactra caVifornica Cour 



Mactra falcata Gld 



CIcmentia stibdiaphana Cpr 



Chione simiUima Sby 



Cliione succincta Vtil 



Dosinia ponderosa Gray 



Tapes staminea Cour 



Saj idom us aratiis (j u u. ) Gld 



Pctricola i^lwJadiformis ? Lam 



Cnrdium prucerum Sby 



I'tiiericardia moiiUicosIa Gabb 



Venericardia monilicosta Gabb 



Liicina Xuftallii Conr 



Lucina aciitilineata Conr 



A rva microdonta Cour 



J.rinea profanda Dall, u. s 



Xiii'ida crigiia Sby 



Ltda calata Hds 



Peckn islandicus Mull 



Pccten hericeus Gld 



Pecten ventricosus Sby. (var. ?) 



Pecten expansus Dall, u. s 



Pecten Stearnsii Dall, n. s 



Pecten HcmphiUii Dall, n. s 



Pecten ? wquisulcatus Cpr. var 



Pecten ? paucicosto.tus Cpr. jun 



Jan ira dentatn Sby 



Ostrca lurida C\]v 



Ostrca Veatchii Gabb 



Atiomia rnnatula Dall, n, s 



Ehectaxis punctoccclata (Cpr.) Dall 



Tornatlna cerealis G\<S. 



Tornaiina eximia ? Baird 



* A list of species obtained from this well, with descriptions of new species, was 

 published by me in the Proc. Cal. Acad. Sci., v, pp. 296-299, 1874. 



