1905.] NATURAL SCIENCES OF PHILADELPHIA. 257 
Several lots collected by Mr. Ferriss in the Chiricahua Mountains 
resemble S. virilzs in size, color and sculpture, but differ in having about 
one-fourth of a whorl more (43), and a noticeably smaller aperture. 
The spiral lines, while visible in some places on all of them, in a favor- 
able light, are often excessively weak. None of them, unfortunately, 
were sent in the flesh. 
In Bar (or Bearfoot) Park, at the summit of the Chiricahuas, the 
specimens taken show some very weak spiral lines below the last suture. 
Alt. 10.7 10.7 mm. 
Diam. 18.9 Leh 
In Sawmill Canyon, Chiricahuas, adjacent to Bearfoot Park, similar 
shells, diam. 18:7 to 19.9 mm., were taken (Pl. XVII, figs. 17, 18, 
19, 20). 
Sonorella virilis circumstriata n.subsp. Pl. XVIII, figs. 48-50. 
In Cave Creck Canyon, Chiricahuas, the shells are darker throughout, 
reddish-brown, with a broad very dark chestnut band with wide pale 
borders, sometimes not very conspicuous. The last whorl shows weak 
but distinct spiral engraved lines above the periphery, in addition to 
the usual fine growth-strie. The umbilicus varies from about 3.3 to 
3.8 mm. in width. A. N.S. P., No. 87,026. 
Alt. 11.6 ies) 11 10.8 mm. 
Diam. P| 20.3 20 LS ae 
Alt. apert. 9.7 9.2 9 S90 
Diam. apert. 10.7 10.4 10 See 
The genitalia (Pl. XX, fig. 19) in two specimens dissected agree in 
having several minor differences from typical S. virilis. The penis, 
while still extraordinarily large, is only about two-thirds as long as in 
virtlis. The vagina is a fourth longer. The epiphallus is the same as 
in virilis. 
This form may prove to be connected with typical virilis by 
intermediate stages, in which case the subspecies may prove super- 
fluous; but at present the dark color, more distinct spiral striz, and 
small aperture of the shell, and the somewhat differently proportioned 
genitalia, seem worth recording. 
Sonorella virilis huachucana n. subsp. Pl. XVU, fig. 24. 
Shell slightly more elevated than S. hachitana, with much smaller 
umbilicus; more elevated than S. virilis, which also is more widely 
umbilicate; glossy, thin, striate but without granulation. The top 
of the last whorl, near the aperture, shows numerous weak spiral incised 
