102 



CONCHOLOGY, 



H. inflecta.* 

 H. clausa.* 

 H. obstricta.* 

 H. elevata.* 

 H. interna.* 

 H. chersina.* 

 H. gularis.* 

 H. ligera.* 

 H. solitaria.* 

 H. jejuna.* 

 H. can cava.* 



H. fallax.* 



H. egena.* 



H. arboreus.* 



H. glaphyra.* 



H. Thyroides.* 



H. labyrinthica.* 



H. major.* 



H. Pennsylvanica.* 



H. subglobosa.* 



H. Zaleta.* 



H. dentifera.* 



H. delabata.- 



2. Genus Carocolla. PI. X. 



The Animal of this and the following genera of this family are 

 precisely the same as in Helix. 



Shell. Orbicular, more or less convex or connoidal above ; the 

 circumference or periphery angulated or keeled ; aperture trans- 

 verse, contiguous to the axis of the shell ; the right margin or lip 

 subangular, often toothed or plaited beneath. Inhabits dry situa- 

 tions in Europe and America. Twenty -two species. 



1 



3. Genus Achatina. 

 Animal. See Helix. 



PI. X, 



