1922] NATURAL SCIENCES OF PHILADELPHIA 97 



interior valleys well within the desert drainage system 6 was wholly 

 unexpected, but it is apparently a common species in Whitewater 

 Canyon in the San Bernardino Mountains, where a live adult 

 and 3 dead juvenals were taken at Station I, a live juvenal and 

 9 dead shells of various ages at Station II, and an adult bleached 

 shell at Station III. None of the shells is of the typical coastal 

 form, nor do they seem exactly referable to the subdolus or rufiterrae 

 types of the San Jacinto and San Bernardino Valleys, but the 

 material is insufficient to justify one's saying more. 



ZONITIDAE 

 Genus ZONITOIDES Pilsbry 



Zonitoides minuscula (Binney 1840) 



1840. Helix minuscula Binney, Bost. Jour. Nat. Hist., vol. 3, p. 435, pi. 22, 



fig. 4. 

 1885. Zonites minusculus W. G. Binney, Man. Am. Land Sh., p. 19, 23, 25, 



30, 31, 32, 35, 38, 57, 63, 479, fig. 18-20. 



Two specimens of this species were taken in the drift of Palm 

 Canyon at Station XII. 



LIMACIDEA 



Genus AGRIOLIMAX Morch 1868 

 Agriolimax sp. 



Ten specimens of a small slug thought to be referable to this 

 genus were taken on a moist slope in Little Palm Canyon, but 

 the specific determination is still uncertain. They have been 

 deposited in the collection of The Academy of Natural Sciences of 

 Philadelphia. 



PUPILLIDAE 

 Genus GASTROCOPTA Wollaston 1878 

 Gastrocopta pellucida hordeacella (Pilsbry 1890) 



1890. Pupa hordeacella Pilsbry, Proc. Ac. Nat. Sci. Phila. 1890, p. 44, pi. 



1, fig. g-k. 

 1916. Gastrocopta pellucida hordeacella, Pilsbry, Man. Conch., (2), vol. 24, 



p. 78, pi. 16; pi. 17, fig. 1-4. 



A scant dozen specimens o£ this minute Gastrocopta, picked from 



6 It is appropriate to mention, however, that species of this genus must cross 

 into the desert drainage at several points, for Mr. Smith has collected H. cuyama- 

 censis in the wash at Warner's Hot Springs, and has found a large race of it 

 (H. c. loivei Bartsch) at an elevation of 5,500 ft. on the east slope of Hot Springs 

 Mountain in the same region. 



