PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



11 



(marked to in the list) from the material obtained in sinking a well* at 

 a distance of from ninety to one hundred and sixty feet below the 

 surface of the earth, and not far from the present sea-level. The matrix 

 is usually rather soft, composed of loosely aggregated grains of sand 

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

 water. 



In the accompanying list, those species found living (R) at the present 

 day in the fauna of the Califoriiiau coast, between San Francisco and 

 San Diego, are marked L, those at i3resent making part of the northern 

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

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

 S. The extinct species (Fj 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 

 8 

 9 



7930 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



7940 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



7350 

 1 



Laqueus califorviciis (Koch) Dall . 



Pholadidea ovoidea Gld 



Corhvla luteola Cpr 



Periploma arijtntat ia Conr 



Splecurtus caUfornianus Conr 



Macoma secta Cour 



Maeoina indtntata Cpr 



Macmna nasula Conr 



Macoma (like) sahuloaa Spengler . 



TeVina modesta Cpr 



Tdlina Bodegensis Hds 



Cumingia calif ornica Conr 



Donax flexuoHus Gld 



Mactra caVfornica Cour 



Mactra falcala Gld 



dementia siibdiaphana Cpr 



Chione similUma. Sby 



Chione succincta Val 



Dosinia ponderosa Gray 



Tapes stuminea Conr 



Sajidomus aratiis (juu.) Gld 



Peiricola pholadtjormis f Lam 



Cardium proceriim Sby 



Fcnericardia monilicosta Gabb 



Venericardia monilicosta Gabb 



Lucina Nuttallii Conr 



Lucina acutilineata Conr 



A rca microdonta Cour 



Axinea profunda Dall, n. s 



Nucula exigua Sby 



Leda ccelata Hds 



Pecten islandieus Mull 



Pccten hericeus Gld 



Pecten ventricosus Sby. (var. ?) 



Pecten expansus Dall, u. s , . . . 



Pecten Stearnsii Dall, n. s 



Pecten HemphiUii Dall, n. s 



Pi cten ? wquisulcatus Cpr. var 



Pecten ? paucicostatus Cpr. jun 



Janira dentata Sby 



Ostrea lurida Cpr 



Ostrea Vcatchii Gabb 



Atiomia limaiula Dall, n. s 



Plu'cfaxis jyunctocoelata (Cpr.) Dall 



Tornatina cerealis Gld 



Tornatina exiinia ? Baird 



San Diego. 



Santa Barbara. 

 San Diego. 



" IV. 



N, L 

 N, L 



L 

 L, S 



L, S 



L 



L 

 N, L 



N 



I 



L 



L 

 L, S 



L 

 X, L ? 

 N, L 

 L, S 

 L. S 



S 

 N, L 



L 



■s 



L 

 L 

 L 



N, L 



S 

 L, S 

 N 

 N 

 S 



L, 8 

 L, 8 

 L, S 



N, L 



L 

 N, L 



N 



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

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



