THE NAUTILUS. 



VOL. XXVIII. JULY, 1914. No. 3 



THE MARINE MOLLUSCAN FAUNA FROM THE VICINITY OF BOLINAS 



BAY, CALIFORNIA. 



BY BRUCE L. CLARK. 



Bolinas Bay lies about ten miles to the north of the Golden 

 Gate. It is one of the few coves along the rocky coast of Marin 

 County where good collections of marine shells may be ob- 

 tained. W. M. Wood in vol. xi, no. 5, p. 49 the NAUTILUS, de- 

 scribes Bolinas Bay as the " Conchologist's Paradise;" cer- 

 tainly there are very few places along the coast of middle 

 California where specimens may be found in such great 

 abundance. 



At Bolinas we find two different types of shore line, the long 

 spit which nearly cuts off the bay from the ocean and the 

 rocky beach. Duxbury Eeef, about two miles to the south- 

 west of the town of Bolinas, extends out into the ocean for 

 over a mile. This is bared at low tide and is one of the best 

 localities that can be imagined for collecting certain rock-lov- 

 ing species. For a more complete description of this locality 

 the reader is referred to the paper mentioned above. 



In March, 1913, the Pacific Conchological Club took a trip 

 to Bolinas Bay for the purpose of making collections at that 

 point. The material collected on this excursion was turned 

 over to the writer for determination. This collection was con- 

 siderably augmented by Mr. Daniel Emery, who visited Boli- 

 nas Bay at a later date. He collected out on the reef and 



