v 



The Nautilus. 



Vol. XXI. MARCH, 1908. No. 11. 



MOLLUSCAN FAUNA OF THE SAN BERNARDINO MOUNTAINS, 

 CALIFORNIA. 



BY S. S. BERRY. 



In view of the extraordinary researches carried on in the neigh- 

 horing regions of Arizona and New Mexico hy Messrs. Ashmun, 

 Ferriss, Pilsbry, and other recent collectors, the writer has often 

 wondered what might he the result of an equally diligent effort in 

 the mountain ranges of Southern California. But little work seems 

 to have heen done in the region, and reports on that little are scat- 

 tered and fragmentary. 



During the month of August, 1907, the writer spent two weeks 

 camping in the San Bernardino Mountains, California, and although 

 he had other business on hand than the advancement of a hobby, he 

 kept his eyes open for mollusks, and is thus enabled to add another 

 fragment to the records. 



The San Bernardino Mountains range in height from about five 

 thousand to nearly twelve thousand feet above sea-level, and abound 

 in grand and beautiful scenery. Extending, as they do in an 

 easterly-westerly direction, the northern slope of the mountains 

 drains into the Mojave Desert, the southern into the Pacific. No 

 mollusks whatever were found in the desert drainage, but the writer 

 was able to give only a superficial examination to all but one or two 

 spots, and has no doubt but that his collections represent a far from 

 complete index to the life of the region. 



The canons and higher regions are well wooded, but the soil is 



