PUPILLA, AMERICAN. 165 



"P. hebes has so much affinity [to P. musconun] that I 

 would have hesitated to separate them if it were not that all 

 my specimens have the same peculiarity, the absence of a 

 white calcareous deposit within the aperture ; a character as 

 everyone knows, of P. muscorum." 



Idaho: Banks of Salmon River (Hemphill) ; near mouth 

 of St. Charles canyon, west of St. Charles (Henderson and 

 Daniels). 



Nevada : White Pine, type loc. ; near Austin, Lander Co. 

 (Hemphill). 



Utah : Blue Mts. and on Monticello Creek, San Juan Co. 

 (Ferriss). 



Arizona. : mountains and high country throughout the state 

 from Coconiuo and Yavapai counties east, south to the Hua- 

 chuca and Chiricahua Mts., Cochise Co. (Ashmun, Ferriss 

 and Pilsbry) ; usually between 5000 and 9500 ft., in humid 

 localities or stations, often abundant. 



Pupa hebes C. F. D'ANCEY, Le Naturaliste, iii, April, 1881, 

 p. 389. PILSBRY & VANATTA, Proc. A. N. S. Phila., 1900, p. 

 589, pi. 22, f. 9, 10. Not P. hebes PILSBRY, Nautilus, xi, p. 

 117. Pupilla hebes (Anc.), PILSBRY & FERRISS, Proc. A. N. S. 

 Phila., 1911, p. 197, with Pupilla hebes kaibabensis, n. subsp. 

 -FERRISS, Nautilus, vol. 34, p. 14, with mut. albesccns. 



Pupa arizonensis Gabb, W. G. BINNEY, 2d Suppl. Terr. 

 Moll., v, p. 40, pi. 3, f. 12, specimen from Ancey. Not of 

 Gabb. 



Pupilla muscorum idaho-ensis HENDERSON and DANIELS, 

 Proc. A. N. S. Phila., 1917, p. 57. 



The absence of a white or tawny callus within the lip dis- 

 tinguishes P. hebes from typical P. muscorum. It never has 

 teeth, such as P. blandi and many muscorum possess. There 

 is a decided contraction behind the outer lip ; typically there 

 is scarcely any crest, and no yellowish streak, but sometimes 

 the crest is well developed. 



Length 4, diam. 1.85 mm., 7 whorls. Bill Williams Mt. 



Length 3.1, diam. 1.65 mm., 5% whorls. Bill Williams Mt. 



Length 3.5, diam. 1.6 mm., 7 whorls. Lander Co., Nev. 



Length 3.25, diam. 1.55 to 1.6 mm. Lander Co., Nev. 



