316 PROCEEDINGS OF THE ACADEMY OF _ [Nov.—Dec., 
convex, the last descending slowly in front.. The aperture is rounded 
oval-lunate, large. Peristome expands a little and is dilated at the 
columellar insertion. 
Alt. 14.6, diam. 25 mm.; alt. of aperture 12.3, width 14.3 mm.; 
43 whorls (type, Station 18). 
Blue and San Francisco Rivers, Graham Co., Arizona, the type 
(No. 119,048 A. N. S. P.) from Station 18 (1914), San Francisco 
River 6 miles above its confluence with the Blue River. Found also 
at Stations 5, 8, 10, 15, 16, 17, 19, 20 (1914), and 89, 91 (1913); from 
Ash Canyon, 6 miles above Clifton, to the mouth of Sardine Creek 
on the Blue River. The higher of these colonies are at little more 
than 4,000 ft. 
While closely related to S. hachitana, it differs from that by the 
absence of white bands bordering the shoulder-band, and of a white 
umbilical area, by the suture descending less deeply and not so 
abruptly in front, and by the smooth penis-papilla. 
11. Genitalia of Sonorella carulifluminis. a, No. 119,048, Station 18, 
et with enlarged detail of penis-papilla; 6, Ne. 119 042, Station TS 02 
Station 16, No. 119,046. 
