The Glassy Snails 



dermis transparent. Diet vegetable. The genus centres in 

 Italy and in the Danube basin. 



Z. fuliginosus, Grif., is an olive brown, shiny snail, with 

 an obliquely depressed, pitted spire and ample round mouth. 

 Diameter, i inch. 



Habitat. — Canada to Florida. 



Z, cellarius, Mull., has immigrated from Europe to our 

 country. Look for a small orb-snail with thin, glassy, pale blue 

 shell with greenish yellow epidermis that shines. Its favourite 

 resort is a damp cellar. It is a very active snail. Length, ^- inch. 



Habitat. — Pacific coast. 



Z, arboreus, Say, inhabits bushes and hides in leaf mould. 

 It is an orb shell, very small, amber, shiny, widely distributed, 

 but hard to discover. It is easily mistaken for the young of other 

 snails. 



Habitat. — Many parts of North America. 



Genus NANINA, Gray 



Shell flattened or top-shape, with umbilical pit, and large 

 mouth; outer lip simple, sharp; columellar lip reflected. Thicker 

 shells than the others in the family, larger, less polished, banded 

 and painted with gay colours. Shell partially covered by an- 

 terior mantle lobes. Glandular, posterior end of foot ends in a 

 spine. Some shells reach three to four inches in diameter. Some 

 are lens-shaped with a sharp keel; some are flat orb shells; 

 others have elevated spires. Six hundred species, in tropics of 

 the Old World. Terrestrial. 



N. Cambojiensis, Rve., is a solid top shell, with wide left- 

 handed aperture, a deep narrow pit, and rounded whorls cross- 

 ribbed, and spirally banded with shades of brown. Diameter, 

 3 inches. 



Habitat. — Cambodia. 



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