PUPILLA, AMERICAN. 165 



"P. hebes has so much affinity [to P. muscorum] 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 Coconino 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. albescens. 



Pupa ariz&nensis Gabb, W. G. BINNEY, 2d Suppl. Terr. 

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

 Gabb. 



Pupilla muscorum idahoensis 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. 



