1922] NATURAL SCIENCES OF PHILADELPHIA 83 



Joseph Grinnell of the Museum of Vertebrate Zoology of the 

 University of California for the use of the accompanying outline 

 map. 



List of Stations, with Data. — Although collecting was done 

 in three groups of mountains, the San Bernardino, San Jacinto, 

 and Santa Rosa ranges, 3 all the localities visited are within the 

 limits of Riverside County, California and in the border zone of 

 the Colorado Desert. 



On the expedition participated in by the writer land snails 

 were taken at fourteen stations, namely Stations I, II, III, IV, 

 VI, VII, VIII, IX, X, XI, XII, XIV, XVI, and XVII. Fresh- 

 water mollusks were taken at three stations, XII, XIII, and XV. 

 One station, V, yielded no collections. Certain stations which 

 were worked by only one of the party are indicated accordingly. 



Station I. Under stones and shrubs on steep talus slope of 

 decomposed granite, west side of Whitewater Canyon, about one 

 mile above mouth, San Bernardino Mts.; alt. 1,700 ft.; April 1, 

 1920. (Plate VIII, fig. 1.) 



Station II. Among loose leaves and mould under small tree 

 (probably Rhus sp.) on rough wall of small side canyon on east 

 side of Whitewater Canyon, near first principal bend, San Bernar- 

 dino Mts.; alt. 1,800 ft.; April 1, 1920. (Plate VIII, fig. 2). 



Station III. Base of west wall Whitewater Canyon, nearly 

 opposite Station II, San Bernardino Mts.; alt. 1,700ft.; April 1, 

 1920; A. G. Smith. (Plate VIII, fig. 1). 



Station IV. Among granite -blocks on lower portion of slope, 

 base of San Jacinto Mts., back of Palm Springs; alt. 500 ft.; April 

 1, 1920; S. S. Berry. 



Station V. Point Happy, Santa Rosa Mts., east of Indian Well; 

 alt. 200-400 ft.; search at night by aid of electric flash-lamp yielded 

 no results; poor place; April 1, 1920; A. G. Smith. 



Station VI. Among granite rocks at head of cove in spur of 

 Santa Rosa Mts., southeast of Indian Well; alt, 250-300 ft., 

 April 2, 1920; slope steep, dry, and with little vegetation. 



3 So far as I can discover there is little to be gained by the prevailing recognition 

 of the San Jacinto and Santa Rosa mountain groups as separate ranges. Palm 

 Canyon or it might be more explicit to say, Palm Creek, is the only distinguish- 

 able boundary between them. Consequently, in clinging to the standard ter- 

 minology, one must accredit all stations east of this creek to the Santa Rcsa, 

 west of it, to the San Jacintos. 



