14 Lozver Californian Shells. [zoe 



inhabiting the mountains, the salt water, and the desert region near 

 the Colorado River, I have divided the list into three parts. The 

 last has not before been included in lists of species belonging to 

 Lower California. Though the desert species do not extend into 

 the peninsula itself below lat. 31° 30', they have been known for 

 thirty-six years to be found along the Colorado River and its back- 

 water overflow, called " New River," which discharges fifteen miles 

 south of the boundary. Until recently most of them were supposed 

 to be extinct species. 



In this catalogue I have used the alphabetical order for conven- 

 ience of reference, and quoted authorities chronologically in refer- 

 ences to localities, etc. Those given in quotation marks have not 

 been confirmed or corrected. Most authors before 1850 confused 

 Upper with Lower California. 



Collectors' names are given in italics to indicate that they were at 

 the places mentioned, while those quoting them are usually marked 

 by names in brackets. 



The species thus far collected on the peninsula and islands near 

 by have been all of considerable size, and no attempt seems to have 

 been made to find the very small species, except in the part north of 

 lat. 31", from whence five are known (Nos. 26, 30, 31, 32, 33). 

 Though the more arid regions may not produce them, the moist 

 seashores, damp canons, and mountain summits, will no doubt still 

 furnish novelties to a careful searcher, many of good size, as shown 

 by Gabb's success in the mountains near the east coast. 



A. Species of the Mountain Regions. 



1. Binneya notabilis J. G. Cooper, 1863. Santa Barbara Ls- 

 land, Cal, lat. 33° 30' (types). West coast of Mexico f" Xaiitho- 

 nyx " Crosse & Fischer). Guadalupe Island, over 100 miles south- 

 west of San Quintin Bay, near lat. 29°, Palmer, Bryant, San Ouin- 

 tin. Lower Cal., lat. 30° 24', Orctdt. 



2. BuLiMULUS ARTEMISIA W. G. Binucy, 1861. " Promontory 

 of Cape St. Lucas, lat. 22° 52', one specimen, Xaritus. 



B. californicus Reeve, 1848, is not confirmed as from the penin- 

 sula, but is believed by late authors to be from the main land. 



3. B. EXCELSUS Gould, 1853. "California," Maj. Rich, La 

 Paz, lat. 24^ 10', later, in Carpenter's work; also found there by L. 

 Belding. 



