116 AMERICAN SPECIES OP VERTIGO. 



8000 ft., Chiricahua Mts., Ferriss. 



Pupa coloradensis COCKERELL, Journ. of Conch., Leeds, vi, 

 1889, p. 63 (name only) ; British Naturalist, 1891, p. 100 

 (description) ; and in Binney, Fourth Supplement to Terr. 

 Moll., v, Bull. M. C. Z., xxii, no. 4, p. 191. Vertigo colora- 

 densis Ckll., STERKI, Nautilus, vi, 1892, p. 5. COCKERELL, 

 Nautilus, x, 1897, p. 134. PILSBRY & VANATTA, Proc. A. N. S. 

 Phila. 1900, p. 603, fig. 2. PILSBRY, Nautilus xvi, p. 58 (copy 

 of orig. desc.). Vertigo columbiana utahensis Sterki, in 

 PILSBRY & VANATTA, Proc. A. N. S. Phila. 1900, p. 603, pi. 

 23, fig. 10. 



Professor Cockerell's description and figure are given above. 

 The type specimen is said to be in the British Museum. It 

 differs from V. concinnula by the smaller size, from V. gouldii 

 by the absence of a basal fold and the coarser striation ; typi- 

 cally it is also a trifle smaller than usual in gouldn, measuring 

 1.75 mm. long, 1 wide, while gouldii is generally 1.85 to 2mm. 

 long. Prof. Cockerell's measurement, 1% mm., was certainly 

 only approximate. The columellar lamella is a little oblique, 

 ascending somewhat as it enters. Perhaps it could be ranked 

 as a subspecies of gouldii, but I think it sufficiently distinct. 



V. columbiana utahensis from Box Elder canyon, northern 

 Utah, is the same thing. The type is drawn in pi. 12, fig. 13. 



A few specimens from the Chiricahua Mountains are slightly 

 larger, 1.9 x 1.1 mm. 



Dr. Sterki has given me the following notes on a specimen 

 received from Cockerell through Binney. ' ' Subcylindrical to 

 somewhat barrel-shaped, perforate, whorls over 5, the last nar- 

 rowed; aperture very small, 0.5 mm. high; a slight, rounded 

 crest behind the margin and a slight flattening or even im- 

 pression over the palatals; at the auricle a slight, small, im- 

 pressed groove just behind the margin and barely above the 

 upper palatal plica. Peristome not or very little thickened; 

 inside there is a distinct, rather thin callus into which the 

 two palatal plicae merge, the lower rather long, the upper 

 much shorter; no suprapalatal. Parietal moderately large; 

 a very small angular; columellar not large but well formed, 

 apparently not lamellar. 1.7 x 1 mm. ' ' 



