372 PROCEEDINGS OF THE ACADEMY OF [June, 



This species is somewhat related to S. dragoonensis, but differs 

 by its smaller size, thinner shell, decidedly smaller umbilicus, and 

 by having the last whorl densely hairy, the hairs extremely short 

 and close. S. apache differs from S. dragoonensis rather conspicuously 

 in soft anatomy. The penis is shorter with a differently constructed 

 papilla; there is no flagellum; the vagina is much longer and is 

 strongly swollen at the base. The anatomical characters of both 

 have been examined in several specimens from different stations. 



The delicately hairy periostracum will serve to separate S. apache 

 from other species of the genus. It is an extremely distinct species. 



Its home is among the great crags around Cochise Stronghold, a 

 favorite resort of the Apaches. Station 10 is some miles northward 

 of the other stations and at a somewhat greater elevation. 



*S. apache was found only in igneous or metamorphic rock, never 

 in the limestone. It was not found sealed to the rock, nor were any 

 white circles seen on the rocks it inhabits, thus differing from nearly 

 all other Sonorellas collected by the authors. 



Other specimens, from Station 1, measure: 



Alt. 10.5, diam. 17.5 mm. 



" 9.2, " 15 

 " 8.8, " 14 



Station 1 is conspicuous from the hillside on the east side of the 

 mouth of Cataract Branch, as a long, bare streak in the dense brush 

 which clothes the slope below the crag at the west side, some distance 

 up the ravine, and rather high on the side. One living shell and 

 numerous "bones" were found by quarrying in the heavy rock of the 

 slide. More living shells were taken at Station 9, the type colony. 



The largest shell seen is a dead individual from Station 27, measur- 

 ing 18.5 mm. in diameter. 

 Oreohelix strigosa var. 



A young dead specimen was found at Station 2, under a stone, and 

 two fragments of the last whorl at Station 13; both in the limestone 

 region, but at very different elevations. Station 2 being only a hundred 

 feet or so above the bed of Tweed Canyon, 13 on the highest peak 

 of its rim. The largest fragment, half of the last whorl of an adult 

 shell, has a diameter of 18.5 mm. It shows a slight peripheral angle, 

 otherwise resembling 0. s. depressa Ckll. 



This Dragoon species seems from the fragments to be a more 

 depressed shell than the extinct Oreohelix of the Florida Mountains, 

 but it may be the same as the Huachucan race. 



