1905.] NATURAL SCIENCES OF PHILADELPHIA. 233 



Near Baldonado Springs, Capitan Mountains, Lincoln county, New 

 Mexico, elevation 8.200 feet, collected by E. H. Ashmun. 



This form is at present well separated from pseudodonla by the uni- 

 formly much larger size. The basal teeth arc also less developed, and 

 the lip comparatively narrower. It is to pseudodonta as rohusta is to 

 ashmuni. It has reached about the same stage of evolution as A . hypo- 

 rhyssa, A. a. rohusta and A. chiricahuana. In the lot of 100 specimens 

 taken by Mr. Ashmun there is one pale greenish-corneous albino. 

 Ashmunella ashmuni (Dall). PI. XII, figs. 19, 20. 



Pohjgyra ashmuni Dall, Proc. U. S. Nat. Mus., XIX, p. 342, 1896. 

 Ashmunella askmuni (Dall) Pils. and Ckll., Proc. Acad. Nat. 8ci. Phila., 1899, 



p. 192; Ancey, Jour, of Malac, VIII, p. 76; Dall, Proc. U. S. Nat. Mus., 



XXIV, p. 501, PL 28, figs. 4, 6, 9. 



This species is small, much like A. pseudodonta, but there is scarcely 

 the trace of a basal tooth. The outer lip is well thickened within, and 

 there is no parietal tooth.' The usual wrinkle-like growth-lines are 

 present, but spiral lines are very faint, not discernible in some speci- 

 mens. Five of the original lot measure: 



Bland, New Mexico. E. H. Ashmun. 



Ashmunella ashmuni rohusta n. subsp. PI. XII, figs. 24-26. 



Polygyra chiricahuana and Ashmunella chiricahuana,, in part, of various 

 authors, specimens from Jemez Mountains and at Jemez Sulphur Springs, 

 New Mexico. 



The shell is similar in size and general contour to A. p. capitanensis; 



chestnut or greenish-chestnut colored, glossy, sculptured with low, 



irregular growth- wrinkles which are strongest below the suture, and 



weaker on the base, and very fine incised spirals, close and numerous 



but very lightly impressed. The spire is very low conoid. WTiorls 



5^, convex, the last about double the width of the preceding, its last 



third decidedly swollen, inflated behind the deep constriction back of 



the lip. The aperture is roundly lunate, without teeth. The lip is 



coffee-tinted, rather narrowly re flexed, convex on the face, and a little 



thickened inwardly within the outer margin. There is no parietal 



tooth. The umbilicus is cylindric within and deep, rather broadly 



expanding at the last whorl, exposing the penultimate whorl. 



Alt., 9.2 8.6 8.7 9 mm. 



Diam., 19 17.2 17.6 16.5 " 



Jemez Mountains, near Bland, New Mexico, at higher elevations than 

 A. ashmuni. E. H. Ashmun. 



