1909.] NATURAL SCIENCES OF PHILADELPHIA. 497 



Patula s. concentrata [ = Oreohelix s. concentrata], 

 Cionella lubrica [ = Cochlicopa lubrica]. 



Several Huachucan species were figured by Mr. Paul Bartsch in 

 his monograph of Sonorella, 1904, and S. dalli n. sp. was described. 



The seven species of snails mentioned above sum up all that was 

 known of Huachucan mollusks prior to the visit of Mr. Ferriss in 1902. 

 In 1904 the range was again visited, 4 and again in 1907 Messrs. Ferriss 

 and L. E. Daniels made extensive collections. Dr. Henry Skinner, the 

 well-known entomologist, made a useful collection of shells in Carr 

 Canyon, in August, 1905, and Mr. C. R. Biederman has contributed a 

 few species from the same place. 



The present report is based upon practically all of the material 

 ever collected in the Huachucas. Through the unfailing kindness of 

 Dr. Dall, the series in the National Museum has been examined. 

 Dr. Gratacap has permitted a re-examination of the types of Ashmun- 

 ella levettei; and Dr. Bartsch has assisted with various helpful services. 



HELICIDiE. 

 Genus SONORELLA Pils. 



The Huachucan Sonorellas are all distinct specifically from those 

 of other ranges. So far as known anatomically, they belong to groups 

 special to this range ; hence speak for a long isolation. 



Omitting S. huachucana, which is unknown anatomically, the species 

 of the Huachuca and Patagonia Mountains can be determined by 

 this key: 



a. — Penis long (about 40 mm. in a shell 27 mm. diam.), with a short 

 hollow papilla containing a tube; epiphallus long, 49-60 mm.; 



flagellum present, S. dalli. 



a 1 . — Penis and epiphallus short, the former containing a fleshy, cylin- 

 dric papilla over half the length of penis; flagellum vestigeal 

 or wanting. 

 b. — Vagina about as long as penis; spermatheca and duct about 



four times as long, S. rowelli. 



b l . — Vagina much longer than the penis; spermatheca and duct 

 not differing greatly from vagina in length. 

 c. — Penis 5 to 7.5, papilla 3.3 to 5 mm. long; upper part of 

 vagina muscular, swollen, usually fusiform, 



S. gramdatissima. 



c l . — Penis 12 to 19, papilla 9 to 13 mm. long; vagina slender, 



with a small fleshy node midway, . . S. danielsi. 



*See Southwestern Shells, Nautilus, XVIII, Sept., 1904, pp. 49-52, and 

 Mollusca of the Southwestern States, Proc. A. N.S. Phila., 1895, pp. 211-290. 



