20 THE NAUTILUS. 



where a good " minus " tide lays bare several acres of rocks and 

 weeds, and which teems with all sorts of marine life, this species 

 seems fairly common. 



Lima dehiscens Conrad. Living; 12 fathoms. 



Monia macroschisma Deshayes. Living; from shore line to 12 

 fathoms. 



Cardita subyuadrata Carpenter. Living ; shore line to 12 fathoms. 



Milneria minima Ball. 12 fathoms ; not common, as we found it. 



Kellia luperousii Deshayes. Found living on shore and also 

 dn dged at 12 fathoms. 



"With it occurs the following: 



Kellia sub orbicular is Montagu. 



Rochfortia tumida Carpenter. Shore line to 40 fathoms. 



Diplodonta orbella Gould. Valves were found on the beach and 

 the species was dredged at 25 fathoms. 



Phacoides californicus Conrad. Low-tide to 40 fathoms. Fairly 

 common. 



Phacoides approximates Dall. 40 fathoms. 



Phacoides annulatus Reeve. One valve was dredged at a depth 

 of about 25 fathoms. 



Chama pellucida Sowerby. Low-tide to 12 fathoms. 



Cardium quadrigenarium Conrad. 12 fathoms; only a few very 

 young valves found. 



* Cardium fucanum Dall. One live specimen and several valves 

 dredged at 20 fathoms. It is notable that C. corbis Mart, was not 

 obtained. See description in NAUTILUS, XX, p. 111. 



Protocardia centifilosa Carpenter. Living; 12 to 30 fathoms. 



Pisidium occidentale Newcomb. Found in numbers in an old 

 watering-trough at Pacific Grove. 



Transennella tantilla Gould. Living ; between tides. 



Tivela stultorum Mawe. Between tides. 



Tivela (?) marginata Cpr. One valve, found between tides, was 

 thus identified at the National Museum. 



Saxidomus nuttalli Conrad. 40 fathoms. 



Marcia subdiaphana Carpenter. 25 fathoms; valves only. 



Paphia staminea Conr. 



Paphia staminea var. petiti Deshayes. 



Paphia staminea var. orbella Carpenter. All found nestling among 

 the rocks between tides. 



