1909.] NATURAL SCIENCES OF PHILADELPHIA. 541 



quite oblique; peristome narrowly expanded, white, with a red streak 

 inside. Basal callus white, weak and small, having a small pit behind 

 the columellar lip. 



Alt. 9.5, diam. 10.5 mm. ; whorls 6. 



On the sides of the canyon below Los Canoas, San Luis Potosi, under 

 loose rocks and leaves on shelves and in crevices of the bluffs. Also 

 on the bluff near the mill of the Tamosopo Sugar Co., and on the side 

 of the highest peak south of Mecos falls. Types No. 99,025 A. N. S. P. 



This species differs from H. chrysocheila cniefiy in coloration, being 

 marked with scarlet streaks behind the lip and at former growth- 

 arrest periods, and in having a white lip, that of chrysocheila being 

 yellow, as tne name denotes. Some examples are very small, but 

 have an expanded lip, diam. only 8 mm., with 5 J whorls. The largest 

 specimen seen measures alt. 12.2, diam. 12.7 mm. 



Named for Mr. E. G. Vanatta. 



Polygyra matermontana jaliscoensis n. subsp. 



The shell is larger than P. matermontana, brown, the last whorl or 

 1£ whorls weakly rib-striate, with faint traces of spiral striae near the 

 periphery, previous whorls finely striate; umbilicus larger, the central 

 cavity well-like, contracting very slowly, more than half the total 

 width; at the last whorl the umbilicus expands rapidly, and has a 

 nearly vertical side wall. Whorls 6, the last very deeply and steeply 

 descending in front, and having a rather deep and long spiral furrow 

 within the umbilicus. The aperture is subhorizontal, the basal and 

 upper margins parallel; teeth somewhat larger than in typical mater- 

 montana, similar in shape, but the sinus between the outer and basal 

 teeth is a little narrower. 



Alt. 6, diam. 12, width of umbilicus 3 mm. 

 " 5.8, " 11, " " " 2.9 " 



Guadalajara, State of Jalisco, Mexico. Types No. 99,512 A. N. S. P. 



This form differs from matermontana in the coarser sculpture, wider 

 umbilicus which is more deeply grooved within, narrower last whorl 

 (viewed from above), more deeply descending at the aperture, etc. 

 It has a wider umbilicus than P. nelsoni Dall. 



A similar shell except that the color is pale yellowish-corneous with 

 a very faint supraperipheral band, and the sculpture of the last whorl 

 is not quite so coarse, was collected by Mr. C. H. T. Townsend at 

 Zapotlan, Jalisco, in July, 1902. It is evidently a very closely related 

 race. 

 Polygyra guadalajarensis n. sp. 



The shell is depressed, with slightly convex spire and moderate 



