LOWER CALIFORNIAN SHELLS. IO3 



description in Binney's L. & F. W. Shells, p. 190, in 

 more slender form and sculpture. The figures there 

 given have 10 to 13 whorls. 



Physa diaphana Tryon. This common Cahfornian 

 species inhabits also a small creek at San Jose del Cabo, 

 Bryant. 



Neritina picta Sowerby . With the preceding, and also 

 at Todos Santos creek (L. Belding). (Not place of same 

 name, now generally called Ensenada, near lat. 32°.) 

 Extends to Panama. Neither of these fresh-water shells 

 is given in Carpenter's Catal. of Cape St. Lucas shells. 



The marine species collected by Xantus numbered 361, 

 and included all those brought up by the Academy's col- 

 lectors. 



