14 Lower 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 cafions, 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 NoraBiLis J. G. Cooper, 1863. Santa Barbara Is- 
land, Cal., lat. 33° 30’ (types). West coast of Mexico (‘‘ Xantho- 
ayx’ Crosse & Fischer). Guadalupe Island, over 100 miles south- 
west of San Quintin Bay, near lat. 29°, Palmer, Bryant, San Quin- 
tin, Lower Cal., lat. 30° 24’, Orcutt. 
2. BULIMULUS ARTEMISIA W. G. Binney, 1861. “ Promontory 
of Cape St. Lucas, lat. 22° 52’, one specimen, Xanfus. 
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. Excetsus Gould, 1853.  ‘‘ California,” Maj. Rich, La 
Paz, lat. 24° 10’, later, in Carpenter’s work; also found® there by Z. 
Belding. 
