1905.] NATURAL SCIENCES OF PHILADELPHIA. 275 



co-type before me, having the same ample iimbihcus and blunted scnlp- 

 tnro. Whether these shells arc to be regarded as really identical with 

 the Iluachuca concentrata, or as a parallel dwarf race independently 

 evolved, is a question remaining to be determined by a study of the 

 forms from the lower canyons of the Hacheta Grande Mountains. 



Oreohelix strigosa huachucana (Pils.). PI. XXIV, figs. 5-7 (types). 



" Pyraniidula" strigosa huachucana Pils., Proc. Acad. Nat. Sci. Phila., 1902, 

 p. 511.^ 



1. The types are from "Conservatory Canyon," otherwise known 

 as Ramsey Canyon, on the northeastern slope of the Huacnucas 

 between Brown and Carr Canyons. 



They are depressed with a broad umbilicus, exposing more of the 

 penultimate whorl than strigosa,^ and it is also more ample within. 

 There arc 5 whorls, of which 2h are embryonic. The tip is a little de- 

 pressed ; the first whorl is delicately striate or wrinkled in an obliquely 

 radial direction. On the second whorl weak raised spiral lines asually 

 set in; and the last embryonic whorl is rather coarsely, irregularly 

 wrinkled radially, and finely striate spirally, with (in some shells) sev- 

 eral raised threads on the last half whorl. These cease abruptly at the 

 end of the embryonic stage. The following whorls are irregularly, 

 obliquely wrinkled and have at most obsolete spiral lines or traces of 

 them in places, often almost imperceptible. The base has no spiral 

 striation as a rule, but in some specimens from Carr Canyon there arc 

 faint spirals there. Up to the end of the fourth whorl the periphery is 

 strongly carinate, but in adult shells it is nearly angular in front, the 

 last half or more becoming rounded. The suture follows the crest of 

 the keel, and usually descends a trifle to the aperture. 



The shell is flesh-colored above, with irregular whitish streaks or 

 maculse; beneath, the opaque white predominates more, and there 

 is a purplish-brown band close to the periphery (but 4 or 5 of 25 exam- 

 ined are equally flesh-tinted beneath, and lack the band, PI. XXIV, 

 fig. 8). The aperture is small, very oblique, with the ends of the lip 

 approaching. The peristome is not expanded. 



Alt. 10.5, diam. 21.8, width of umbilicus 6 mm.; aperture 8.8 mm, 

 wide. Types No. 83,370, A. N. S. P., collected by James H. Ferriss. 



The reproductive system of one of the types is figured (PI. XIX, 



*It was evidently this race which Dr. R. E. C. Steams reported from Fort 

 Huachuca as Helix (Patula) hemphilli Newc. {Proc. U. S. Nat. Mus., XVI, 1893, 

 p. 745), and Dall from the Huachuca Mountains, as P. strigosa (Proc. U. S. Nat. 

 Mus., XIX, 1896, p. 335). 



' The comparisons are with typical O. strigosa from the extreme Northwest,, 

 which is identical with Hemphill's var. partna. 



