130 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Holospira chiricahuana gracilis n. subsp. PI. 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 

 creek. One colony of small extent. 



Thirty specimens measure : 



Length. Diam. Whorls. Length. Diam. Whorls. 



LIMACIDiE. 

 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^J. 

 Vitrina alaskana Dall. 



Long Park, 8,000 feet ; Head of Cave Creek, at about the same 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 meridioiialis P. and F. 



Quartzite Peak, near Fort Bowie; head of Cave Creek, 8,000 feet; 



