280 PROCEEDINGS OF THE ACADEMY OF [Mcll., 



but less developed one runs in the middle of the upper surface of the 

 last whorl. The embryonic shell of nearly two whorls is not distinctly 

 defined from the subsequent growth ; the first whorl is smoothish with 

 some radial wrinkles only; the second is densely obliquely costulate, 

 with cuticular lamellse on the fine riblets in perfectly preserved exam- 

 ples. There are weak traces of a few coarse, low spirals. Wliorls 4, 

 rather rapidly increasing, the last slowly descending in front, very con- 

 vex beneath. The aperture is very oblique, shortly pear-shaped, the 

 peristome simple, upper and lower margins much convergiiig and 

 straightened, connected by a short and thin parietal callous. 



Alt. 7 , diam. 13.5 mm., not including the cuticular processes. 



Cave Creek Canyon, Chiricahua Mountains, Arizona, collected by 

 J. H. Ferriss. Co-types No. 87,011 and 87,146, Coll. A. N. S. P. It 

 lives in a moist situation, in stone talus near the falls of the stream. 



Cuticular processes or "hairs" are generally present on the shells 

 of very young Oreohelices, but in this one alone their development 

 culminates in the adult snail. Their projection at the angle of the 

 whorls of the spire makes the lamellse look continuous over the sutures. 

 When denuded the shell is sharply striate, with some ill-defined spirals 

 marking the positions of the more prominent cuticular wreaths. 

 Besides those described above, there are some minor and variable 

 spirals on the most perfect specimens. 



The processes are very efficient as gatherers of soil, \^•hich is probably 

 glued on by the mucous of the animal, as usual. In the general plan 

 of ornamentation, this bearded Oreohelix is not unlike Polygyra {Steno- 

 trema) pilshryi Ferriss. 



By its tricuspid central and bicuspid lateral teeth, as well as by the 

 general form of the shell, 0. harbata recalls 0. he7nphiUi, especially 

 when denuded of the "beard." The embryonic sculpture is not very 

 unlike some forms of hemphilli, but it most resembles that of 0. s. 

 socorroensis, though a little coarser. The insertion of the penis retrac- 

 tor solely on the epiphallus is like Radiocenirum, and unlike any of the 

 typical Oreohelices. 



The foot of 0. harhata is small, slate-blackish above, and finely granu- 

 lated. No genital furrow is discernible, but there is a pair of dorsal 

 grooves. The tail is flattened and pale above. The mantle edge is 

 very thick and fleshy. 



The genitalia of one of the types are figured (PI. XIX, fig. 5). The 

 penis resembles that of *S. strigosa huachucana, the lower half being 

 much swollen, the upper half smaller and cylindric. Internally the 

 larger portion has 4 or 5 large and some smaller longitudinal folds, the 



