236 PROCEEDINGS OF THE ACADEMY OF [Mch., 
Specimens from Canyon Diablo, near Rowe, New Mexico (Pl. XIII, 
figs. 35, 36, 37), are exactly like those from Las Vegas Hot Springs. | 
Alt. 8 6.8 6.6 6.4 6.3 mm. 
Diam. 14 12.8 12.3 12.3 12 « 
Whorls 5h 5h 5h 5h (Ost 
Ashmunella thomsoniana portere Pils. and Ckll. Pl. XIII, figs. 39-46. 
Ashmunella thomsoniana portere Pils. and Ckll., Nautilus, XIII, p. 49, Sep- 
tember, 1899; Cockerell and Cooper, Nautilus, XV, p. 109, February, 
1902, with mut. alba, p. 110; Murdoch, Jour. of Malac., VIII, p. 82, Pl. 
7, fig. 8 (genitalia); Pilsbry, Proc. Acad. Nat. Sci. Phila., 1900, p. 559, 
footnote 4, Pl. 21, fig. 6 (pallial complex). 
A. t. coopere Ckll., Nautilus, XVII, p. 36, July, 1903 (Pecos). 
Shell larger than thomsoniana, light brown, glossy, a little translucent, 
with distinct growth-wrinkles and fine incised spiral lines. Whorls 54 
to 6, convex, the last deeply constricted behind the lip, swollen behind 
the constriction. Lip brown-tinted above. Parietal lamina mode- 
rately developed. Outer lip-tooth long and concave. Basal tooth 
bifid, the inner denticle smaller, sometimes reduced to a low callous. 
Umbilicus rather broadly open, exposing the penultimate whorl more 
than in thomsoniana. 
Type locality, Upper Sapello Canyon, Beulah, New Mexico (PI. 
XIII, figs. 39-42, 46, Miss Wilmatte Porter, Dr. H. Skinner and others). 
Twenty-two specimens collected by Dr. Skinner measure as follows: 
Alt. 8 8.5 8 So 8 8 8 8 8.2 
Diam. t¢ tie oe? TKS 15:3 15 15.6 14.8 15 
Whorls 6 54 52 54 54 54 ot 54 5} 
Alt. $2: SeeGeeee 78 8 Lil We 7.8 
Diam: ) 15.5. Gis Peeing (188. 14° 14:8 See 
Whorls - 5) 64.) Poa 5-5. Sp ee 
Ali 7.8 8 8 7.6 mm. 
Diam. 1441, 14 14,1. ase, * 
Whorls dt. «OF 54 54 
Prof. Cockerell and Miss Cooper measured 40 specimens of portere 
from Beulah: 
2 specimens are 14 mm. diam. 
iy “ec “ 144 a3 (a9 
17 “ 73 15 ce “ce 
6 as ce 15+ ce ce 
3 “ “ 16 ce ce 
There is no appreciable difference in the comparative altitude among 
the specimens I have seen. 
