LOWER CALIFORNIAN SHELLS. lOI 



dalena Bay, etc. The large collections he obtained were 

 all credited to Lower California and Socorro Islands, but 

 there is a strong suspicion among naturaHsts that many of 

 them were brought there from the coast of Mexico by 

 vessels and sold to him as being from the peninsula. In 

 this way only can the absence of many of his species 

 from later collections be accounted for. He afterwards 

 collected on the Mexican coast, and may have mixed 

 localities. 



SPECIES COLLECTED. 



BuLiMULUs (Mesembrinus) pallidior Sowerby. — 

 "Chili" Pfeiffer ex. coll. of H. Cuming. '• Lower Cal- 

 ifornia for 350 miles north," W. G. Binney, from Xantus 

 coll. and fide P. P. Carpenter, who however quotes it 

 from San Diego also. It is not confirmed as found for 

 300 miles south of the boundary. The occurrence of 

 this and B . -proteus, also reported from Lower California 

 as well as Peru or Chili, is made more interesting by the 

 similar occurrence of several plants in both regions which 

 are not found anywhere between. 



B. (M.) excelsus Gould. " La Paz '" .V(r?/////5. Also 

 found in that vicinity by L. Belding. 



B. (M.) iNSCENDENS W. G. Binney, subsp. brvanti 

 J. G. C. "On dry mountains 800 to 1,000 ft. high, be- 

 tween Cape St. Lucas and Margarita Bay, also for 

 three hundred and fifty miles farther north, climbing 

 high Copal trees, never found on the low-lands or table- 

 lands " Xantus. Mouth very obliquely expanded, so 

 that the last whorl seems from above to diverge 45^ 

 from the axis of shell. Near San Jose del Cabo, 

 twelve miles east of the Cape, Bryant. There seems to 

 be no other difference from Binney' s figure and descrip- 

 tion of this well-marked form. This variation is evidently 

 a more developed growth than that of the typical form. 



