1910.] NATURAL SCIENCES OF PHILADELPHIA. 69 
one-third the length of the penis. Epiphallus not very unlike the 
penis in length. Flagellum as usual in the genus. The vagina is 
short. Spermatheca oval, on a long duct. Two specimens of No. 
97,414 measure: 
(ELE UL RCSLT SP a te a 11.5 mm. 
SEES CE TL SSR I MR Sa AR Se 9 8 f 
Derren cia 8k yy Me a 3 215 
NNER TS Ce ene ee ee cr er 1 nh 
mee) Waeina.:........:... Cl ee nett a Bir) aes 
Be SPER NECA ATI” AUC 22 oe idscencncdd estas 6. catenee: 
The jaw has five ribs. The pericardium is about half as long as the 
kidney. 
In its soft anatomy, this species resembles S. bowiensis Pils. and 
also S. rowelli (Newc.), but differs from the latter by having a dis- 
tinct flagellum. The shell is more like S. rowelli, but differs from both 
species by its more inflated contour and very large aperture. In 
conchological characters the species is, for a Sonorella, very distinct, 
and unlike other known Chiricahuan snails. 
The smallest specimen seen measures, alt. 8, diam. 13.5 mm. This 
species is named in memory of William G. Binney. 
Group of Sonorella virilis. 
These forms are distinguished from all other Helices known to us 
by the enormous length of the penis and its papilla. Sonorella rincon- 
ensis, which has an equally long penis, but a comparatively short 
papilla, is apparently the most nearly related species. All other known 
Sonorellas have the penis short or of moderate length. All known 
species of this group are Chiricahuan. The sculpture of the embryonic 
shell resembles that of the group of S. hachitana, but usually the 
pattern is very indistinct. 
Sonorella virilis Pils. Pl. II, figs. 1-6. 
= 
S. virilis Pils., Proc. A. N. S. Phila., 1905, p. 266, with var. circumstriata, 
p. 267. 
This species was described from a single shell which so far as we can 
learn was probably taken in Rucker Canyon. The variety circum- 
striata was described from the talus at the foot of Reed’s Mountain, 
about a half mile below Reed’s place, Station 11 in Cave Creek. The 
series now available shows that this variety is scarcely distinct enough 
