498 PROCEEDINGS OF THE ACADEMY OF [NOV., 



Sonorella huaohucana Pilsbry. PL XIX, figs. 16, 17. 



S. virilis hiiachucana Pilsbry, Proc. A. N. S. Phila., 1905, p. 267, pi. 17, 

 fig. 24. 



This is a non-granulose species with conspicuous pale borders along 

 the brown band. We formerly thought it a subspecies of A. virilis 

 of the Chiricahua range, but since all the other Helices of this range 

 are specifically distinct, it is not likely that huachucana will prove an 

 exception. It comes from Brown's and Bear Canyons, and must be 

 rare or very local. None were taken in 1907. 



The soft anatomy is unknown. We therefore know nothing of its 

 relationships with other species. Fig. 16 represents a shell from 

 Bear Canyon. Fig. 17 the type from Brown's Canyon. 



Group of S. dalli. 



Sonorella dalli Bartsch. Plate XIX, figs. 1, 2, 3. 



Sonorella dalli Bartsch, Smiths. Miscell. Coll., Vol. 47, p. 193, pi. 31, fig. 1 



(Oct. 10, 1904). 

 Epiphragmophora hachitana, depressed variety from Tanner Canyon, Dall, 



Proc. U. S. N. M., XIX, pp. 339, 340, pi. 31, figs. 7, 10 (1896). 



Specimens were taken only in Tanner Canyon, the type locality. 

 It is probably restricted to this place. It is a fine species, distin- 

 guished by the broad, flattened shape, very open umbilicus and much 

 deflexed last whorl. The largest specimen taken measures 28 mm., 

 the smallest 23 mm. diameter. Compared with &. granulatissima latior, 

 which also occurs in Tanner Canyon, *S. dalli is more openly umbilicate, 

 the aperture is flattened above, the oblique sculpture is coarser. In 

 some old specimens the front edge of the parietal callus is thickened, a 

 narrow ridge connecting the ends of the lip. 



The penis (pi. XXII, fig. 4) is extremely long, slightly enlarged 

 distally, its walls thin, with most minute and close transverse ruga?. 

 It contains a smooth papilla, tapering to an obtuse apex, and about 

 one-fifth the length of the penis. The papilla is hollow with rather 

 thin walls. Within it a slender tube runs from the epiphallus to the 

 apex, where it opens by a lateral pore. This tube is lightly attached 

 to the wall of the penis-papilla. It is indicated by dotted lines in 

 fig. 4. The epiphallus is extremely long, terminating in a short 

 flagellum. The penis retractor muscle, 7 mm. long, is inserted upon 

 it 4 mm. from the end of the penis. The long vagina has a slender 

 neck, enlarging moderately above. 



The spermatheca is globular, on a duct much shorter than the penis. 



