1917.] NATURAL SCIENCES OF PHILADELPHIA. 99 
Alt. 12.3, diam. 21.4 mm.; 53 whorls. 
Stations 55 and 56, near Hermosa, Sierra County, New Mexico. 
This subspecies resembles O. metcalfez in color and the smooth 
surface, but differs by wanting the strong keel of the last whorl. 
Genitalia are substantially as in O. m. radiata. The penis is 
| figured, fig. 4a, and opened, fig. 4b. The lower portion has several 
very irregular and unequal fleshy ridges within, upper portion 
papillose. Length of penis 13 mm., of its thickened lower part 5 mm. ; 
length of epiphallus 3.5 mm.; of penial retractor 6 mm. Diameter 
of the shell 20.5 mm. 
The embryonic shells (Pl. IX, fig. 12) are exactly as in the forms 
of metcalfei from the Black Range. In the adult shell the embryo 
photographs abnormally dark on account of its yellow hue. 
Fig. 4.—Penis of Oreohelix metcalfei hermosensis. a, exterior; b, the same opened. 
Oreohelix metcalfei cuchillensis n. subsp. PI. IX, figs. 1, la, 1b. 
This form is smaller than hermosensis, and the peripheral angle 
in front of the aperture is weaker, scarcely noticeable. Typically 
there are very minute and superficial spiral striz, but on many 
specimens these cannot be made out. The last whorl descends 
little or not at all in front. There is about a half whorl less. 
Alt. 9, diam. 18.2 mm.; 44 whorls. 
Cuchillo Mountains, Sierra County, at two stations about two 
miles apart, at the southern end of the range. 
We have hesitated between uniting this with O. m. hermosensis 
and giving it separate standing. The sizes intergrade in a small 
number of specimens, cuchillensis varying from 15.4 to 20 mm. 
diameter; yet where this is the case, the specimens are readily separa- 
ble by other characters. Except for one specimen of 20 mm. diam., 
none of the lot of over 200 specimens exceeds 19 mm. diameter. 
