100 CONCHOLOGY. 



Shell. Terrestrial, very thin, pellucid, ovate oblong, with a 

 conical pointed spire, formed of only one or two whorls; aperture 

 very large and oval, edges disunited; right edge always acute, the 

 left arched, formed by a smooth attenuated columella. The shells of 

 this genus never having their lip thickened or reflected, distinguish 

 them from those of the genus Bulimus, to which they bear a 

 strong resemblance. Inhabits the sides of ditches and lakes, both 

 in Europe and America. Seven species. 



Succinea cuculata. Succinea oblonga. 



S. amphibia. S. patula. 



S. rubescens. S. pellucida. 



*S. aperta. 



10. Genus .hiricula. PI. X, 

 Animal. See Helix. 



Shell. Solid, thick, and smooth, oval, oblong spire very 

 obtuse, aperture entire, enlarged, ear shaped, much contracted 

 behind ; edges not united, right lip thick and generally reflected 

 outwardly ; the left or columella with one or more teeth or callous 

 plaits. This genus derives its name from its resemblance to the 

 ears of certain animals. It is a land shell found chiefly in the 

 East and West India Islands. Sixteen species. 



Auricula midae. Auricula scarabseus. 



A. Judae. A. bovina. 



A. sileni. A. caprella. 



A. leporis. A. myosotis. 



A. felis. A. minima. 



A. Dombeiana. A. coniformis. 



A. nitens. A. monill. 



A. angiostoma. A. labrella. 



11. Genus Cyclostoma. PI. X. 

 Ani7naL See Helix. 



Shell. Terrestrial, distinguished from the preceding genera by 

 a perfectly round aperture, reflected lip, and horny operculum, 

 summit papillose; left edge having its origin very detached from 

 the spire. Inhabits the East Indies. Thirty-five species. 

 Cyclostoma planorbula. Cyclostoma rugosa. 



