86 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 
Sonorella tryoniana n. n. 
Sonorella rowelli (Newc.), Pilsbry, Proc. A. N. S. Phila., 1902, p. 511; 
Nautilus XVI, p. 32. Pilsbry & Ferriss, Proc. A. N.S. Phila., 1905, p. 
261, pl. 18, figs. 33-35; pl. 20, figs. 138, 14, 20. Not Helix rowelli New- 
comb. 
Sanfords, Pima Co., on the bank of Sonoita creek under leaves 
and logs, near the water, J. H. Ferriss, type and paratype No. 83273 
A. N.S. P. Also a short distance eastward in the northern end of 
the Patagonia mountains, J. H. F., 1902, and E. H. Ashmun, 1898. 
Empire mountains at Stations 149 and 152 (1918), J. H. Ferriss. 
This small species, related to the Chiricahuan S. bowiensis and 
S. binney?, was long thought to be Newcomb’s H. rowelli. That 
species, however, proves to be a Micrarionta (EHremarionta), from 
southwestern Arizona. 
S. tryoniana is much like S. bowiensis, but in that species the 
margins of the lip converge more, leaving a shorter parietal callus. 
At Sanfords this species was found on the bank of the creek near 
the water under leaves and logs. 
The specimens from far northward, in the Empire Mountains, 
appear to be practically typical iryoniana. Among the species of 
these mountains, this shell resembles S. binneyi imperialis in color 
and texture, but it is smaller, the last whorl is not so wide, the 
umbilicus is decidedly larger (contained between 63 and 7 times 
in the diameter), and the aperture is relatively smaller, though of 
similar shape. Surface very glossy, lightly striate, without spiral 
lines or granulation. Height 9.4, diam. 15.7, umbilicus 2.38 mm.; 
44 whorls. 
Living examples were taken at Station 149, but those preserved 
unfortunately became dry, and the sketch, Plate VIII, fig. 6, and 
the measurements obtained by soaking it up, are given for what 
they may be worth. The penis-papilla is cylindric with a blunt, 
rounded end. 
Length of penis 3.5 mm.; papilla 1.5 mm.; vagina 4 mm. 
Sonorella berryin. sp. Plate II, fig. 13. 
Station 103 (1918), in malpais slides on a small hill north of 
the road near the forks, on the east side of the Roskruge Range. 
Type no. 131001 A. N.S, P. 
The shell is depressed-globose, thin, narrowly and half-covered 
umbilicate, translucent, white, with a chestnut-brown band above 
the periphery and narrowly showing on the penult whorl, and a 
pinkish-buff band below the suture, spreading about half way to 
