1910.] NATURAL SCIENCES OF PHILADELPHIA. 127 



another race of the White Tail type. The material is not sufficient 

 for a definite decision. 



Turkey Creek. — On the right (north) side, about two miles below 

 Paradise (pi. XII, figs. 13, 14, 15, 16), Holospira apparently referable 

 to intermedia was found in two colonies, very variable in size and 

 sculpture. Internal lamellae one, two or three. 



Limestone Mountain. — Although very widely separated from the 

 range of intermedia, the shells do not seem separable from that race. 

 Four are figured, pi. XII, figs. 9, 10, 11, 12. 

 Holospira cionella capillacea n. subsp. PI. XIII, figs. 15, 16. 



Similar to intermedia except that the intermediate whorls are very 

 finely, closely striated; only the axial lamella developed, in a few 

 opened. Length 11.7 to 12, diam. 3.5 mm. White Tail Canyon, 

 Station 10, about half way to the summit of the ridge, below cliffs. 

 This colony is the only one found in igneous rock (rhyolite). Sonorella 

 micro, and Ashmunella lepiderma occur in the same vicinity. Holo- 

 spira was very scarce. 



Holospira chiricahuana Pilsbry. PI. XIV, figs. 5-8. 



Proc. A. N. S. Phila., 1905, p. 219, pi. 26, fig. 9; pi. 27, figs. 26-29; p. 215, 

 fig. 4. 



The type locality of H . chiricahuana is on the steep slopes of a small 

 dry ravine or wash tributary to Cave Creek, below and near the 

 entrance of the cave. The slope faces the south and is composed of 

 very steeply dipping friable calcareous shale and earth formed by its 

 decomposition, with sparse vegetation, agave, sotol and bear grass. 

 Dead shells are scattered in profusion, and the living ones lurk under 

 bunches of dead bear grass, etc. The colony is about one-eighth of 

 a mile long and perhaps 100 yards wide. This is also the type locality 

 of Oreohelix chiricahuana. Map on p. 107, Station 8. 



A majority of the specimens (82 per cent.) have a superior or parietal 

 lamella from \ to h of a whorl long, on the roof of the penultimate 

 whorl near its end, above the aperture or on the front side, but in some 

 (18 per cent.) this is wanting. In those of the type lot formerly 

 opened it was absent or very weak, but in others of the type lot, as 

 well as in many topotypes opened, this lamella is more or less strongly 

 developed. The interior of the outer lip is very heavily thickened 

 with a white callus within. 



All forms of H. chiricahuana thus far found have the shell strongly 

 ribbed throughout, with no tendency to become smoother on the 

 cylindrical portion. 



While in the type form of H. chiricahuana the internal lamellae are 

 inconstant, yet in several other colonies localized in various parts of 



