1915.] NATURAL SCIENCES OF PHILADELPHIA. 387 
Type No. 112,236, A. N.S. P., collected by Pilsbry and Daniels, 
August 29, 1910. 
The Escabrosa Ridge, or mountain side on the left, ascending 
the first left-hand ravine above Bisbee on the Tombstone Road, is 
the home of this Holospira. Extensive burning of the brush has 
narrowed their range and decreased their numbers, at least for the 
time, so that the series collected was not large.? Some very small 
scrub oaks remain in places; there are three species of agave, some 
sotol and bear-grass, a few cylindropuntias, and many herbaceous 
plants, now after the summer rains gay with flowers; over everything 
a little scarlet morning-glory, which we afterward found common 
in the ranges westward. 
Out of 20 shells opened, 18 have the axial lamella only; one has 
also a small superior or parietal, and one has superior and basal 
lamellz, both very low and small. 
This is a larger and longer species than A. ferrissi, and further 
distinguished by the smooth later whorls and deficient internal 
lamellae. The Chiricahuan H. arizonensis Stearns differs chiefly 
by having the internal lamelle larger. 
_ Holospira ferrissi fossor n. subsp. Pl. XV, figs. 6 to 6b. 
The short, cylindric shell is ribbed throughout, with about 47 ribs 
on the penultimate whorl. The last whorl is conspicuously flattened 
on the back, then gibbous (the gibbosity internally filled with white 
shelly material) and contracting to the aperture, the basal crest 
rather conspicuous. These features are more conspicuous than in 
H. ferrissi. There is an obtuse axial lamella in the front of the last 
whorl, and typically no other lamelle; but three specimens out of 
20 opened show a weak parietal lamella also. The color is wood 
brown or avellaneous, with the usual white patch on the last whorl. 
Length 8.7, diam. 3.3 mm.; 103 whorls (type). 
An el Beael os 1) ae ‘““ (shortest shell). 
Berane Shai s) rocol.e <0) LOS ‘“‘ (largest shell). 
7" i acolo as (Loe ‘‘ (slender shell). 
Mule Mountains: on slopes of a limestone peak about 2 miles 
east of Warren, Arizona. Type No. 112,238, A. N.S. P., collected 
by Pilsbry and Daniels, August 31, 1910. 
The town of Warren may be reached by a trolley line from Bisbee. 
It lies lower than Bisbee and is separated from the plain by a range 
*180 specimens in the lot taken by Pilsbry, probably as many or more taken 
by Daniels; most of them dead shells. 
