ZONITES. 1G1 



H. CHERSINELLA, Dall. PL 51, figs. 43-45. 



Xarrowly perforated, depressed, transparent, very light horn- 

 color, shining, with distant incremental wrinkles ; whorls 4, 

 scarcely convex, the last depressed globose. Diam. 3 mill. 



Big Trees, Calaveras Co., Cal. 



II. SCULPTILIS, Bland. PL 51, figs. 3-4. 



Scarcely perforate, depressed, pale horn-color above, lighter 

 below, with regular impressed striae, shining ; whorls 7, planuiate, 

 last whorl rapidly enlarging, flattened below, and a little exca- 

 vated in the umbilical region, perforation almost entirely covered 

 by the narrowly reflected columellar lip. Diam. 7-12 mill. 



North Carolina, Tennessee, Alabama, Texas. 



II. ELLIOTTI, Redfield. PL 51, figs. 5, 6. 



Narrowly umbilicated, finely striate, greenish horn-color, hardly 



translucent, shining and smoother beneath; whorls 5, the last 



sometimes very slightly depressed at the aperture, suture deeply 



impressed, peristome a little sinuate, acute but thickened within. 



Diam. 9 mill. 



Mountains of Georgia, Tennessee, N. Carolina 



and West Virginia. 

 II. WHITNEYI, Newcomb. PL 51, figs. 7, 8. 



Umbilicated, subplanate,thin, smooth, scarcely striate, shining, 

 smoky horn-color; whorls 4, the last planate above and below. 



Diam. 5'5 mill. 



Near Lake Tahoe, California. 



II. ARBOREA, Say. PL 51, figs. 9-17. 



Umbilicated, depressed, thin, pellucid, smooth, shining, yel- 

 lowish corneous, or amber-colored ; whorls 4-5, with very minute 

 microscopic oblique striae, umbilical region indented. 

 Diam. 5 mill. 



Labrador to Florida and Texas, Great Slave Lake, 

 Montana, Nevada, British Columbia to San Diego, Cal.; 



also Cuba, Haiti, and Guadeloupe, W. I. 



The Florida and West Indian specimens have received the 

 name of H. ottonis, Pfr. (figs. 12-14), and those of California 

 have been called H. Breweri, Newcomb (figs. 15-17). 

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