130 PROCEEDINGS OF THE ACADEMY OF [Feb., 
Holospira chiricahuana gracilis n. subsp. Pl. XIV, figs. 9-12. 
The shell is more slender and tapers more slowly than the type, 
and has more whorls. It is more slender than H. c. optima, Only 
the axial lamella developed in 19 out of 20 specimens opened, the 
other one having a strong parietal lamella also. 
Found at Station 10, on the crest of a narrow ridge, a spur from the 
south wall of Cave Creek Valley, which terminates in a high conical 
hill standing not far from the creek. This is the only colony of the 
species found south of Cave Creek, the others being north of the 
créek. One colony of small extent. ; 
Thirty specimens measure: 
Length. Diam. Whorls. Length. Diam. Whorls, 
LEST oat 14 10.9 3 123 
iB Berg 3 14 10.9 3 ibs 
TE.5 3) 14 10.8 3 13 
ie5 > 134 LO) 3 124 
1 Bi aes) 3 134 105 3 134 
133 3 134 10.4 a 13 
ih he 3 134 1003 3 124 
PLSE aod 134 10°3 2.9 124 
iat = 134 10.2 3 124 
11 3 134 10.1 3 124 
11 3 134 Loo. 3 124 
11 3 124 10 3 124 
11 3 Vhe4 10 3 12 
11 2.9 134 9.9 3 12 
10.9 S 13 9.9 2.9 124 
LIMACIDZ2. 
Agriolimax hemphilli ashmuni Pils. and Van. 
Barfoot and Long Parks. The specimens vary from a pale yellowish- 
gray to the blackish color of the types. 
ZONITID A. 
Vitrina alaskana Dall. 
Long Park, 8,000 feet; Head of Cave Creek, at about thesame eleva- 
tion; Barfoot Park. 
Zonitoides arborea (Say). 
Head of Cave Creek, 8,000 feet; Long Park, Station 12 a; Rustler 
Park; Rucker Canyon. It is not commonly diffused, and seems to be 
absent in the dryer part of the range. 
Zonitoides milium meridionalis P. and F. 
Quartzite Peak, near Fort Bowie; head of Cave Creek, 8,000 feet; 
