514 PROCEEDINGS OF THE ACADEMY OF [Nov., 



Pyramidula (Gonyodiscus) shimeki cockerelli Pils. 



"Reef," Carr Canyon, at 5,000 feet (C. R. Biederman). 



Radiodiscus raillecostatus Pils. and Ferr. 



Carr Canyon; Miller Peak, near the top and on the north side, and 

 in Wickersham's Gulch ; Wickersham's. 



Helicodiscus eigenmanni arizonensis Pils. and Ferr. 



Found in 1904, no special locality recorded. 



ZONITID^. 

 Zonitoides arborea (Say). 



Wickersham's Rock, Miller Peak; Tanner Canyon; Ash Canyon. 

 Zonitoides minuscula (Binn.). 



Wickersham's, Miller Peak; Tanner Canyon; Benson. 



Zonitoides minuscula alachuana (Dall). 



Ash Canyon; Wickersham's. 



Zonitoides milium meridionalis Pils. and Ferr. 



Wickersham's. 

 Vitrea indentata umbilicata (Ckll.). 



Tanner Canyon; Wickersham Gulch; Miller Canyon, one very large 

 example, diam 6.7 mm.; Ash Canyon. 



Euconulus fulvus alaskensis Pils. 



Wickersham's rock, Miller Peak. 



Vitrina alaskana Dall. 



Wickersham's, Miller Peak. 



SUCCINEIDiE 

 Sucoinea avara Say. 

 Tanner and Ash Canyons. 



VALLONIID^. 

 Vallonia perspeotiva Sterki. 



Tanner, Pine and Ash Canyons; Wickersham's, Miller Peak. 



Vallonia cyclophorella Ancey. 



Wickersham's, Miller Peak. 



PTJPILLID^]. 10 

 Pupilla hebes (Ancey). 



Wickersham's, Miller Canyon. 



|° Pupoides hordacea (Gabb) and Pupilla syngenes (Pils.) were found in rivei 

 drift at Benson. Of the latter both dextral and sinistral shells, one of each. 



