338 PROCEEDINGS OF THE ACADEMY OF _[May, 
Length 17.9, diam. 3.9 mm.; whorls 17 
“c ce 4 ce ins 
17-2; | 17 
eee arte 6 cones 
“ee 17, iz 3.9 cc iad 155 
he hae a lesa 
“ce 16.3 ce 4 cc ce 153 
Station 4, on the south slope of Daniels Mt. near the summit. 
Types Nos. 112,269, A. N.S. P., collected by Pilsbry and Daniels, 
August 22, 1910. 
Out of 20 shells opened, 16 have three lamelle and 4 have two, 
the axial and basal. The pillar-like shape, numerous whorls, and 
prevalence of a superior lamella, as well as the deeper position of the 
lamellz, are individually variable characters, yet in the aggregate 
they may suffice to define a race in this group. 
These Holospiras live among rocks where there is very little 
xerophytic vegetation and the heat is terrific. The type lot was 
picked up at about the same elevation as Station 5, but there the 
exposure is less calorific, the sparse pifions and the cliffs afford 
shade, so that the soil retains some moisture. 
Holospiras were seen scattered over a large area below and around 
Station 4. - 
Holospira bilamellata heliophila n. subsp. Plate VII, figs, 3 to 3c. 
The shell is small, rather slender, with a long cone; strongly costate 
throughout; usually having axial and basal lamellee within the middle 
part of the penultimate whorl. Peristome well expanded in the 
basal and columellar margins, but scarcely so near the upper angle. 
(1) One lamella, the axial. 3 specimens = 15%. 
Length 14.2, diam. 3.8 mm.; whorls 16 
en WES ee on bk iby aise: 
“ce 13 “ec 3.9 (as a3 144 
(2) Two lamellz, axial and basal. 13 specimens = 65%. 
Length 14.8, diam. 4 mm.; whorls 155 
14.8 ce 4 “cc cc 15 
“ 14.6 ce 4 ce a3 154 
he A Dg i ogee aS: 
ce 14 a3 3.9 ce “e 15 
“cc 14 ce B47/ “cc iz 154 
“c 13.8 ce 3.9 a3 a3 143 
cc 12.6 (a3 3.8 atk 6c 132 
“ce ila tes “cc 4 “ce ce 12+ 
