PUPILLA, AMERICAN. 163 



P. llandi chariest o-mnsis n. subsp. PL 19, figs. 8, 9. A 

 peculiar race, smaller and otherwise differing from the ac- 

 count of siiblubrica, and similar to sonorana, was taken by 

 Ferriss on Charleston mountain, Lincoln Co., in southern 

 Nevada. 



There is a well-developed crest behind the lip. The pari- 

 etal lamella and lower palatal fold are strong and long; 

 columellar nodule distinct. Length 3, diam. 1.4 mm.; 6% 

 whorls. 



This might be considered a form of P. sonorana were it not 

 so remote from the known range of that species. 



4. PUPILLA SOXORANA (Sterki). PI. 19, figs. 10, 12, 13, 15. 



Shell perforate-rimate, cylindrical, apex obtuse, rounded; 

 color brownish-horn; surface finely striated-rugulose, more 

 coarsely so near the aperture; whorls 6%, gradually increas- 

 ing ; suture rather deep ; the last whorl comparatively small, 

 compressed in its inferior part, the base narrow, almost 

 keeled ; near the aperture a high, sharp bulging [crest] filled 

 with a strong whitish callus, shining through the shell; a 

 narrow, deep constriction in front of it, and an impression 

 over the palatal fold. Aperture rather small; margins ab- 

 ruptly but rather narrowly everted; lamella and folds 3, 

 white; parietal rather deep-seated, long, spiral; columellar 

 perpendicular (along the columella), lamellar; palatal (the 

 inferior) rather strong, often with a thread-like prolongation 

 inward. Alt. 2.6, diam. 1.3 mm. (Sterki). 



Length 3.25, diam. above apert. 1.4 mm.; l~y whorls. 

 Topotype. 



Length 2.75, diam. above apert. 1.3 mm. ; 6% whorls. 

 Topotype. 



Length 3.05, diam. above apert. 1.4 mm. ; 7 whorls. Cloud- 

 croft. 



Length 2.5, diam. above apert. 1.3 mm.; 6 whorls. Cloud- 

 croft. 



New Mexico: Whiteoaks (type loc.), Gilmores, Mescale (E. 

 H. Ashmun) ; James canyon, Cloudcroft, Sacramento Mts. 

 (Rehn and Yiereck) ; summit of Hacheta Grande, 8,500 ft., 



