1918.| NATURAL SCIENCES OF PHILADELPHIA. 321 
in Cosper’s pasture, Station 58 (pl. VII, fig. 1) and farther north- 
ward in the southern part of Apache Co., on Mt. Thomas, White 
Mountains, at Station 75 (1913). In all of these stations there are 
the same capacious whorls and frequently very high spire noted in 
the Mogollons. 
All of the preceding inhabit high elevations, and all were found 
under logs and leaves in heavy timber, as in the Black Range of New 
Mexico. The following lots were all among rocks (pl. VI, figs. 2-5b). 
Farther down the Blue River (in Greenlee Co., Arizona), the species 
was found as far as Station 23, east side of the river 2 miles above 
the mouth of Grant Creek (pl. VII, figs. 5-5b). While there is 
abundant intergradation with the shells of higher elevations just 
noticed, the majority of the shells are more openly umbilicate. 
Many have the spire very high, but this is variable in all the lots. 
Three examples from Station 23 figured measure: 
Alt. 16, diam. 26.5 mm., umbilicus 4.7 mm. 
ce 18, “cc 24 ag ce 4.5 e 
ia 17.8 “cc 23 ce cc 3 ce 
The shells from Station 25 are almost as large; those from Stations 
26 to 32 (going up the river) are smaller. Specimens from Station 
29, 1 mile above Blue River Ranger Station (pl. VII, figs. 2-2b) 
measure: 
Alt. 17, diam. 22.3 mm. 
“c 18 ce 22D cc 
cc 15 “ 29 ce 
4¢ 15.6, a3 18 ce 
Fig. 13. Oreohelix cooperi, albino, Station 29. 
There are some beautiful albino specimens in this lot (fig. 13). 
Other examples are figured (pl. VII, figs. 3, 3a) from Station 27, 
near the Blue River Ranger Station, where the shells are very dark 
colored. One measures, alt. 13, diam. 20.5, umbilicus 5 mm. 
A series from Station 36, Mt. Lisa, Lisa Creek, Socorro Co., 
N. M., 20 miles north of Alma, is similar to those of Station 29, also 
with not a few albino shells. 
