ART. 5 NEW LAND SHELLS FROM ARIZONA MARSHALL 3 



Base rounded, nearly smooth, polished. Aperture oblique, nearly 

 round, a moderate callus across the body whorl. Umbilicus wide, 

 showing all the whorls. 



The type (Cat. No. 380689, U.S.N.M.) measures: Maximum diam- 

 eter, 17.5 mm.; minimum diameter, 15 mm.; height, 9.5 mm., and 

 comes from Heber, Navajo County, Ariz. It and numerous paratypes 

 (Cat. No. 334603, U.S.N.M.) were collected and presented by Dr. 

 Walter Hough of the National Museum, for whom the species is 

 named. 



The largest of the paratypes measures: Maximum diameter, 21.75 

 mm.; minimum diameter, 19 mm.; height, 12 mm. 



In depressed form and cordlike carina, this species resembles 

 OreoJieJix yavapai Pilsbry but lacks spiral sculpture and granules. 

 Nearly all the paratypes are bleached and have lost the brown spiral 

 band above and below the periphery. 



OREOHELIX HOUGHI WINSLOWENSIS, new subspecies 



Plate 1, Figures 4, 5, 6, 12 



Similar to Oreohelix Jioughi, but averaging smaller and slightly 

 more elevated. The corded carina is almost lacking but usually 

 occurs for a short distance in the suture of the third whorl, and the 

 body whorl is rounded. 



The type (Cat. No. 380690, U.S.N.M.) measures: Maximum diam- 

 eter, 19.5 mm.; minimum diameter, 17.5 mm.; height, 11.75 mm. 

 It and 28 paratypes (Cat. No. 181309, U.S.N.M.) come from Clear 

 Creek, near Winslow, Navajo County, Ariz., and were collected and 

 presented by the late Dr. Edgar A. Mearns. The National 

 Museum collection contains also 22 specimens from 12 miles south 

 of St. Johns, i-i Apache County (Cat. No. 225973, U.S.N.M.); 2 

 specimens from Holbrook, Navajo County (Cat. No. 151459, 

 U.S.N.M.) ; 5 specimens from near Canyon Diablo, Coconino County 

 (Cat. No. 198518, U.S.N.M.) ; 13 specimens from Hardscrabble Draw, 

 near Zuni Sacred Lake, Apache County (Cat. No. 341772, U.S.N.M.) ; 

 and 25 specimens from Coon Mountain Crater, near Flagstaff, 

 Coconino County. From this list of localities it will be seen that 

 the species inhabits the valley of the Little Colorado River or its 

 immediate vicinity. 



EXPLANATION OF THE PLATE 



Figures 1, 2, 3. Oreohelix yavapai vauxae, new subspecies, natural size. 



4, 5, 6. Oreohelix houghi tvinslowensis, new subspecies, natural size. 

 7, 8, 9. Oreohelix houghi, new species, natural size. 



10. Oreohelix houghi, new species, 10 diameters. 



11. Oreohelix yavapai vauxae, new subspecies, 10 diameters. 



12. Oreohelix houghi winslowensis , new species, 10 diameterr. 



U. S. GOVERNMENT PRINTING OFFICE : 1929 



