122 PROCEEDINGS OF THE ACADEMY OF [Feb., 
At Station 2, at the bottom of the canyon (middle branch), a few 
dead specimens sharply, but very finely, striate throughout were found 
(pl. XI, figs. 9, 10, 11, 12). On the tapering cone and basal whorl 
the striz are coarser. At the head of this branch a small series (about 
25) of similar shells was found. They are hardly distinguishable 
from H. cionella. Holospira colonies are scattered profusely all over 
the head slopes of Big Emigrant Canyon. We doubt whether more 
than one specific stock is represented there, though when thoroughly 
worked several minor races might be mapped out. 
Holospira cionella Pils. Pl. XII, figs. 1, 2. 
Proc. A. N.S. Phila., 1908, p. 217. 
The types of this species came from near Old Fort Bowie. The fort 
stands on the narrow and low neck which unites the Dos Cabezas 
range with the Chiricahuas proper. Only the adobe walls now stand; 
only the cemetery remains to be guarded! The ridge has here a 
minimum elevation of 5,500 feet. About a mile south Mr. Dixon’s 
place lies in the valley east of two conical peaks, known as Bull Hill 
and Quartzite Peak, the former of cherty limestone formation. Holo- 
spira cionella is found on the slope of Bull Hill facing the fort, the 
exact spot being along a tiny gully which crosses the trail to the fort. 
This place is indicated on the right at (3) in the photograph reproduced 
on page 67. It probably has an elevation of 6,000 to 6,200 feet. 
Another colony is on the lower slope of Quartzite Peak, toward Dixon’s 
house, also indicated in the photograph at (2). Specimens from this 
place agree most closely with the original types of cionella. 
The figured types (pl. XII, figs. 1, 2) are cylindric shells, evenly and 
rather finely but strongly rib striate, the strize not weaker on the latter 
whorls; they are coarser on the swelling behind the contraction preced- 
ing the lip. Out of 11 shells of the type lot opened, 9 have an axial 
lamella only; 2 have axial and superior or parietal lamelle. When 
originally describing this species only a few specimens were opened, 
and all happened to have one lamella only. The four specimens figured 
in 1905 measure as follows (the first three may be considered cotypes) : 
Length 12, diam. 3.1 mm.; whorls 123. 
cc ieiimay Ul: bplatan mn sey Deo read 9 
sine 1 bi SE) ae. ra el. 
ce Ste ce 3 ce ce ie 
Bull Hill (pl. XII, figs. 4-8). Specimens from the locality facing 
the Fort are all smaller than the types, though a few individuals of 
the original lot, such as pl. 27, fig. 31, of our former paper, are entirely 
similar. 
