{910.] NATURAL SCIENCES OF PHILADELPHIA. 91 
In “Canyon No. 3” (not knowing a better name) the shells were 
sometimes specked with transparent dots. 
JIG LS ie Sn 114 113 114 104 10 
| 164 16 16 153 
Limestone Mountain is thickly covered with juniper, mountain 
mahogany and other trees and shrubbery, for it is in a U.S. Forestry 
Preserve. The shells were found in the upper part of the mesa before 
the rough ground was reached, in company with Holospira, but small 
in size. As the hill became higher the shells were larger and more 
numerous. Here also was found a toothed form of Ashmunella and 
also Pupe and other of the smaller species. The mountain is composed 
entirely of limestone, upon the northern slope at least. Rocky cliffs 
and talus gave the snails ample shelter. Between this station and the 
Cave Creek Station, about 25 miles distant, there are no limestone 
exposures and no Oreohelix chiricahuana. 
Oreohelix barbata Pils. Pl. VI, Figs. 1-3. 
Oreohelix barbata Pils., Proc. A. N.S. Phila., 1905, p. 280, pl. 25, figs. 57, 
58 (shells); pl. 19, figs. 5 (genitalia); pl. 22, fig. 6 (teeth). 
Twenty colonies of this species have been found, all between the 
head of the southeast fork of Pinery 
Canyon and the Rucker “box,” at 
elevations of not less than 7,000 feet, 
and within a distance of twelve miles 
in length and two to three miles in 
width. They dwell upon all sides of 
these high peaks in the rock slides or 
talus, and among the rocks upon the 
slopes of the gulches and ravines. Ferriss and Daniels found the most 
robust specimens living under from two to three feet of rock well 
covered over with sod, with the most perfect specimens of Ashmunella 
chiricahuana, a toothed Ashmunella, Sonorella virilis and the little 
mountain rattle-snake, Crotalus pricet. In Cave Creek Canyon they 
often occur under one or two feet of rock. 
In their own territory Ashmunella, Sonorella and the other forms of 
Oreohelix are usually to be found wherever the conditions are favorable; 
but it is not so with O. clappi and O. barbata. These snails are found 
only by chance, in isolated colonies, and these colonies are usually 
divided into families, the old pair and their spring crop of all sizes 
when not fully matured live together. 
Every colony as a rule has some peculiarity. O. barbata ranges 
Fig. 14.—0. barbata, denuded shell 
from Cave Creek, Station 4. 
