1915. 



NATURAL SCIENCES OF PHILADELPHIA. 



331 



mon-drab to pale ecru-drab, often having a band of the same below 

 the periphery; embryonic whorls fa^\m color. Spire convex or very 

 low conic, If embryonic whorls convex, sculptured with delicate, 

 retractive radial rib-strise, a few very fine spiral lines in the intervals 

 (fig. 6) ; following whorls irregularly marked with weak growth- 

 lines, less convex, a little flattened or impressed above the suture, 

 the last whorl convex, very indistinctly angular at the periphery, 

 slowly descencUng to the aperture, convex beneath. The aperture 

 is very oblique, about as high as wide. Peristome thin, the upper 

 and basal margins somewhat prolonged and a little straightened, 

 converging, joined by a thin, adnate parietal callus. 

 Alt. 9, diam. 15 mm.; 5f whorls. 



B 



Fig. 4. — A. Genitalia of Orcohelix hachetana. B, Oreohelix ferrissi. 



Genitalia (fig. 4, A). The penis is very short, its distal half en- 

 larged. The walls of the rather large cavity are densely papillose, 

 the papillse long, arranged in oblicjue rows in some parts. Epi- 

 phallus about equal in length to the penis, its distal half enlarged. 

 Vagina equal to the penis in length. Length of the penis, epiphallus 

 and vagina 5 mm.; length of spermatheca and duct 15 mm. 



Summit of Hacheta Grande Mountain, at Station 11, collected 

 August 25th, 1910, by H. A. Pilsbry. Also Station 10, Pilsbry and 

 Daniels. 



This species was collected in considerable quantity — several 

 hundred living specimens. The "bones" are seen all over the upper 

 four or five hundred feet of the peak, between Stations 10 and 11 of 

 the map. Living snails were all taken on the west side and were most 



