164 PUPILLA, AMERICAN. 



Big Hachet Mts. (Pilsbry and Daniels) ; 14 miles northeast 

 of Tucumcari, Cuervo River, San Miguel Co., and Turkey 

 Creek, near Wagon Mound, Mora Co. (Dr. E. C. Case). 



Pupa (Pupilla) sonorana STERKI, Nautilus, xii, March, 

 1899, p. 128, with var. tenella, p. 129. --Pupilla sonorana 

 Sterki, PILSBRY, Proc. A. N. S. Phila., 1915, p. 345. WALKER, 

 Occas. Pap. Mus. Zool. Univ. Michigan, no. 15, 1915, pp. 4, 5. 



P. sonorana differs from P. Uandi by its much longer 

 parietal lamella (fig. 10) and the far greater impression of 

 the last whorl preceding the crest (fig. 13). The colmnellar 

 lamella is longer. P. syngenes dextroversa is a longer species 

 with more whorls and less impressed base. 



In most lots seen there are longer, shorter and intermediate 

 individuals. 



In one lot from Cloudcroft, in the Sacramento mountains, 

 there are two examples with an upper-palatal tubercle also, 

 making four teeth in all (pi. 19, fig. 12). 



This species would hardly be considered specifically distinct 

 from P. triplicaia of Europe were it not that the two inhabit 

 antipodal parts of the globe. 



P. sonorana form tenella (Sterki). Shell rather oblong or 

 ovoid; the bulging in the palate less high, and only with a 

 slight callus inside. Most specimens are less high than the 

 types, 2.3 to 2.6 mm. (SterJci). 



New Mexico: Capitaii Mts. (Ashmun). 



The specimens before me, part of the original lot, differ 

 very little from typical P. sonorana; the crest is often fully 

 as high as in that, It seems scarcely separable as a race. 

 One measures, length 2.7, diam. above aperture 1.45 mm. 



5. PUPILLA HEBES (Ancey). PI. 18, figs. 1 to 4. 



' ' Shell subcylindric, rather thin, rimate, obtuse at the apex, 

 corneous-tawny, very minutely scarcely striatulate. Whorls 

 6-7, strongly convex, joined by a deep suture, regularly in- 

 creasing, the last swollen towards the aperture, then deeply 

 contracted. Aperture truncate-suboval, toothless, or provided 

 with a small parietal tubercle, not thickened within. Peri- 

 stome thin, reflected. Length 3.25, width 1.5 mm. (Ancey). 



