1 6 Lower Californian Shells. [zoE 



10. B. SUFFLATUS Gould, 1 853. La Paz, lat. 24" 10', MaJ. 

 Rich, Gabb. San Jose del Cabo, Bryant. The large, east coast 

 form of B. pilula.{l) Not found by Xantus, nor on west coast. Bry- 

 ant also found a few pale brown ones, besides the usual white; both 

 colors in living- shells. 



11. B. XANTUSi W. G. B., 1861. " Promontory of Cape St. 

 Lucas," four specimens, Xanitis. The three species reported from 

 the Cape, but not since detected, and two others which Xantus 

 stated to extend so far up the west coast, but not confirmed, were 

 perhaps considered by him as varieties of one or more of the other 

 species. The possibility that he obtained some from Socorro Is- 

 land, or from the Mexican coast, where he also collected, is to be 

 considered. 



12. Cylindrella irregulare Gabb, 1867. Central range of 

 mountains near east coast, around Muleje, lat. 26° 50', Gabb. 



13. C. taylori Pfeiffer, 1861. (C. 7iewcombiana) Gabb, 1867. 

 Same locality as the last, Gabb. Original locality of Pfeifi'er's type 

 unknown. 



14. Helix areolata " Sowerby MS." (Pfeiffer, 1845). 

 California I//?ids, " near Columbia River " (Pfeiffer). This confu- 

 sion can only be explained by mixing of labels, as Pfeiffer seems 

 to have received these shells from the British Museum for descrip- 

 tion, with the MS. names. "Margarita Bay, lat. 24° 20'. The 

 only land shell received from the bay," (Pease). Cedros Island, lat. 

 24° 02'', Veatch, a very large form described as H. veatchii, New- 

 comb. These, with H. levis and pandorcs, form a closely allied 

 group. 



In 1867 Mr. W. M. Gabb made a geological exploration of the 

 peninsula for a land company, under J. Ross Browne, traveling the 

 whole length and crossing it ten times. In his report to Mr. 

 Browne, dated San Francisco, 1869 (published in J. R. Browne's 

 Report on Mining Regions), he mentions finding immense numbers 

 of this species, sometimes whitening the ground with bleached 

 shells, and extending from Salada, lat. 24° 15', to San Tomas, lat. 

 31° 35', on west coast. He mentions none of the allied forms, and 

 thus appears to consider them varieties. (See notes on them). Dr. 

 Veatch in same report states that the var. veatchii was the only land 

 shell he found on Cedros Island, and on the peninsula east of it. 



