1995.] NATURAL SCIENCES OF PHILADKBLPHIA. 279 
flat above it, forming a straightly conic spire. Suture not impressed. 
The last whorl descends in front. Aperture rather small, as in O. s. 
huachucana. Umbilicus ample within, as in hwachucana. 
Alt. 2 10.2 10.6 mm. 
Diam. 21 19.5 Pyrat ss 
Whorls 43 5t 54 
Mountains near Kingston, Sierra county, New Mexico, collected by 
O. B. Metcalfe. 
This form stands close to the huachucana series, from which it differs 
only in the spiral striation of the base, which is usually quite distinct 
though very minute,” and in the persistence of the peripheral keel to 
the aperture. In the last feature it is less evolved than huachucana. 
In some specimens of the latter the keel also persists, though less 
strongly. 
Oreohelix strigosa socorroensis 0. subsp. Pl. XXV, figs. 49-51. 
The shell is thin, with 2} embryonic whorls closely and sharply 
obliquely striate, with a few low, coarse, indistinct spirals on the last 
embryonic whorl. Whorls 44 to 42, convex, the later ones rudely but 
not coarsely wrinkled, without noticeable spirals above, but the base 
is very densely and distinctly striate spirally. The last whorl is quite 
convex above and below a cord-like peripheral keel, which extends 
nearly or quite to the aperture. The last whorl descends a little and 
slowly in front. The umbilicus is rather small, but enlarges at the 
opening. Aperture as usual. 
Alt. 8 9.2 8 8.8 mm. 
: Diam. 15 14.8 tac3 feceser: 
Negra Mountains, Socorro county, New Mexico. Types No. 58,128, 
A.N.S. P., presented by Dr. W. D. Hartman, collector unknown. 
Related to O. s. metcaljei, its neighbor on the south, but that is a 
more strongly carinate shell with flat whorls and straightly conic spire. 
They agree in the beautiful circular striation of the base. 
Oreohelix barbata 0. sp- Pl. XXV, figs. 57, 58. 
The shell is broadly and openly umbilicate, depressed, biconvex, 
earinate, pale brown, lusterless; obliquely closely lamellose costulate, 
the lamella lengthened into a cuticular fringe at the periphery, and at 
several places on the base, forming circular fringes there. A similar 
10 In some specimens of hwachucana from Carr Canyon, such as Pl. XXV, fig. 36 
and figs. 37-40, the base is spirally striate, but it is not so in huachucana from other 
places. 
