1 82. Quayierly Journal of Conchology. 



Dr. Jeffreys in the istvol. of "British Conchology" says it is 

 the Flanoibis laris, Alder, and probably the P. cornu, Ehrenberg, 

 the P. Rosstnassleri, Auerswald, and that Dr. E. von Martens is of the 

 opinion that it is also the P. gyrorbis of von Seckendorff. In the 

 5th vol. of " British Conchology " he adds P. arcticus, Moller and 

 probably P. sibiricus, Dunker. 



In 1872, Dr. Jeffreys in his article "The Mollusca of Europe 

 compared with those of Eastern North America" confirms the 

 identity of P. parvus, Say with P. glaber, Jeff. 



Having lately received from Mr. H. Hemphill of California, U.S., 

 specimens of Planorbis ( Gyraulus ) ve?-micularis, Gld, from Oregon. 

 I find them to be identical with well-grown specimens oiP. glaber, 

 Jeff., from Sutton Park, Birmingham. 



The name Planorbis parvus. Say, has the priority and may ne- 

 cessitate a change that will be somewhat inconvenient to British 

 conchologists who have become familiar with the name given to it 

 by our great leader in the science Dr. Jeffreys. 



THE MOLLUSCA OF SANTA ROSA ISLAND, 

 CALIFORNIA, U. S. 



By LORENZO G. YATES. 



Santa Rosa is one of the chain of Islands forming the south- 

 erly side of what is known as "The Santa Barbara Channel," on 

 the coast of California, about 300 miles South of San Francisco. 

 The Island was formerly thickly inhabited by a race of Indians now 

 extinct. 



The following list includes the mollusca found living, and 

 those used by the aborigines for food and ornament, collected by 

 the writer during a recent expedition to the Island, in search of 

 antiquities for the Smithsonian Institution. 



The species marked x were used for food; those marked * for 

 ornaments and money ; and those marked \ were used for paint cups 

 and probably for food. 



