TWO NEW LAND SHELLS FROM THE WESTERN STATES. 



By Paul Bartsch, 



Curator, Division of Marine Invertebrates, United States National Museum. 



Wliile accompanying lier husband, the Secretary of the Smith- 

 sonian Institution, on a collecting trip thi'ough the Northwest, Mrs. 

 Walcott gathered some specimens of OreoJielix in Montana. These 

 belong to an undescribed race which I take pleasure in naming for the 

 discoverer. 



The second subspecies, OreoJielix idahoensis haileyi, here described 

 was collected by Mr. Vernon Bailey of the Biological Survey, in 1896, 

 on a limestone ridge, at an altitude of 700 feet, in the Seven Devils 

 Mountams of Idaho. 



OSEOHELIX YAVAPAI MARIAE, new subspecies. 



Plate 31, fig.s. 1-3. 



Shell decidedly depressed helicoid, almost lenticular, flesh colored, 

 with a narrow bro\v!i band on the upper surface, which is a httle 

 nearer the peripheral cord than the suture, and a second even nar- 

 rower one bordering the peripheral cord on the lower sm'f ace. Nuclear 

 whorls scarcely differentiated from the succeeding turns, bearing the 

 same sculpture as the adult whorls, but a httle less strongly expressed. 

 Periphery of the v/horls provided with a cord-like keel, which becomes 

 somewhat weakened on the last quarter of the last tm*n. Entire 

 surface both above and below marked by slender thread-like incre- 

 mental hues and fine spiral striations ; last whorl slightly descending 

 near the aperture. Base broadly, openly umbihcated, weU rounded; 

 a httle more convex at the umbilical wall than at the lateral margin. 

 Aperture very obUque, oval; peristome neither thickened nor re- 

 flected at the edge; parietal waU strong, rendering the peristome 

 complete. 



The type and eight specimens of this subspecies (Cat. No. 215132, 

 U.S.N.M.), were collected by Mi's. Mary Walcott on Squaw Creek 

 near the mouth of GaUatin Canyon, Montana. The type has 5.6 



Proceedings U. S. National Museum. Vol. 5 1 -No. 2155. 



331 



