228 PROCEEDINGS OF THE ACADEMY OF [Mch., 
This is the senior name for a member of the group of closely related 
forms inhabiting the Sierra Blanca and adjoining Sacramento Moun- 
tains, in middle-southern New Mexico. 
The shell is more globose than any other known Ashmunella, having 
about the proportions of the large Eastern Mesodons. It is dull and 
roughly sculptured on the last whorl with coarse, curved irregular 
wrinkles, between and over which fine incised spirals may be traced. 
The rather small aperture is contracted by a wide, heavy lip, the outer 
margin of which is indistinetly thickened within. There is a low, in- 
distinet basal tooth or callous, and a very small, deeply placed, oblique 
parictal tooth, sometimes absent. The umbilicus is narrow and deep, 
but slightly enlarging at the last whorl. Whorls 53. 
Alt. 10, diam.17 mm. 
Leos wel = (Dall’s type). 
WO ey ate 
MS OD 6 SG rh 
oO 2 OR e A Bay ot 
hr (Ee geare a Se mt kf 
ray. ay FE BAD | of! 
Sicrra Blanca, New Mexico, collected by Rev. E. H. Ashmun. 
Ashmunella rhyssa miorhyssa (Dall). PJ. XII, figs. 5, 6. 
Polygyra miorhyssa Dall, Nautilus, XII, p. 75, November, 1898. 
Ashmunella rhyssa miorhyssa (Dall), Pils and Ckll., Proe. Acad. Nat. Sci. 
Phila., 1899, p. 193, figs. 1-3 on p. 189 (genitalia, jaw and teeth); Pilsbry, 
Proc. Acad. Nat. Sci. Phila., 1900, p. 108 (anatomy). 
This form differs from A. rhyssa chiefly in being smoother, the coarse 
wrinkles of that being reduced to striz. The umbilicus is a little more 
open at the last whorl. In other respects there are no constant or even 
prevalent differences. 
Alt. 9, diam. 16mm. Sierra Blanca (Ashmun). 
Alt. 9, diam. 15.5 mm. Sierra Blanca (Ashmun). 
Alt. 10.6, diam. 16.8 mm., whorls 6 
Alt. 9.9, diam. 16 mm., whorls 53. 
Alt. 10.3, diam. 16 mm., whorls 53. 
Sierra Blanea, Lincoln county, New Mexico (E. H. Ashmun). 
Near Eagle creek (C. H. T. Townsend). 
Ashmunella rhyssa hyporhyssa (Ckll.). Pl. XII, figs. 7-18. 
Polygyra r. hyporhyssa Ckll., Nautilus, XII, November, 1898, p. 77. 
Ashmunella hyporhyssa (Ckll.) var. edentata, with mut. rufescens and alba, 
Ckll., Nautilus, XIV, p. 72, October, 1900 (Cloudcroft). 
A.r. hyporhyssa Ckll., Vanatta, Nautilus, XVI, p. 58, September, 1902 (High- 
rolls and Clouderoft); Pilsbry, Proc. Acad. Nat. Sci. Phila., 1900, p. 108, 
fig. 1 (genitalia of Cloudcroft specimen). 
te 
Near Eagle creek, Sierra 
Blanca (Townsend). 
