MOLLUSES FROM MEXICAN BOUND ARY SURVEY— BALL, vol.xviii. 



rather well-marked incremental lines and microscopic vermicular mark- 

 ings, of wliicli the louoer axes are subi^arallel to the lines of groMth; 

 suture distinct, whorls full and rounded, but with the periphery slightly 

 above the middle, the last whorl descending a little near the aperture; 

 base full and rounded; umbilicus narrow, deep; aperture expanded; the 

 liiUiXY lip reflected , but the outer lip not so. Height, 1 1 ; major diameter, 

 17; minor diameter, 13.5 mm. 



Locality. — Banks of the Santa Cruz Eiver, near Tucson, Arizona. 

 Like Arionta var. indioensis, Yates, but smaller, with less oval aperture 

 and narrower umbilicus. That species has the brown line not covered 

 by the suture. 



EPIPHRAGMOPHORA HACHITANA, new species. 



Shell large, depressed, polished, sculptured with irregularly promi- 

 nent, incremental lines, but without spiral striation or surface granu- 

 lation; whorls four and a half, rounded; suture distinct; last whorl 

 depressed near the peristome; aperture oblique, with a thickened and 

 somewhat dilated but not reflected lip; pillar lip broad near the body; 

 umbilicus moderate, deep, exhibiting nearly two whorls; the fresh shell 

 livid waxen, or pale reddish-purple, with a single darker baud, bordered 

 by paler color, above the periphery. Major diameter, 2G.5 ; minor diam- 

 eter, 21 ; height, 12 mm. 



Locality. — Ilachita Grande Mountain, at an altitude of 8,270 feet, 

 and in many other localities in the central region. 



This resembles U. maydalcnensis, Stearns, but is a much larger shell, 

 and, when fresh, of a different color. 



POLYGYRA CHIRICAHUANA, new species. 



Depressed, thin and i)olished,dark brown, with five and a half whorls, 

 and sculptured only with tine incremental lines ; suture distinct, periphery 

 rounded, with a constriction behind the peristome, which descends 

 slightly; umbilicus deep, narrow; aperture oblique, with a narrow, 

 livid, strongly reflected lip, which is somewhat flexuous and entirely 

 destitute of internal teeth; body without teeth, the lips united by a 

 thin smooth callus. Height, 7.7; major diameter, 18; minor diameter, 

 14.8 mm. 



Locality. — Fly Park, Ohiricahua Mountains, Arizona, at an elevation 

 of 10,000 feet. 



Like P. levettei, but larger and edentulous. 



POLYGYRA MEARNSII, new species. 



Shell i)inkish-browii, depressed, flve-whorled, sculptured only with 

 fine lines of growth; spire much depressed, suture very distinct; pe- 

 riphery rounded, but above the middle of the whorl; base somewhat 

 compressed, rounded; umbilicus deep and narrow; last whorl a little 

 depressed and strongly constricted behind the peristome, which is 



