184 



POPULAR CONCHOLOGY. 



out finding it studded with the smaller kinds of Bulimi. 

 There are three small species found in England. 



Beck has divided this genus into twenty genera, and 

 Albers into fifty, but none seem to be generally adopted. 



Achatinella. Swain. (Helicteres Fer.) — Shell 

 rather small, conical, either sinistral or dextral, 

 not umbilicated; whorls generally six or seven 

 in number, and smooth ; columella short, broadly 

 appressed, callous, and mostly twisted; aperture 

 rather small; lip simple, sometimes rather thick- 

 ened, never reflected.* Animal not differing out- 

 wardly from that of Helix. — 45 species, f 



Small beautifully coloured shells, bright, smooth, and 

 elegantly banded with fine lines of black, or mottled with 

 various colours. They are all found in the Sandwich 

 Islands on bushes and trees. 



Achatina. Lam. — Shell oval, or turreted ; the outer 

 lip thin, and never turned back or thick- 

 ened ; the inner notched at the base ; 

 aperture about half the length of the 

 shell; no operculum. Animal very like 

 that of the Helix. — 129 species J; also 

 fossil. 



Some of the Achatince are the largest of 

 all known land shells ; they live always 

 near water about trees, and are very plen- 

 tiful in Africa, particularly at the Cape of 

 Good Hope ; some are found in the West 

 Indies, but very few in Europe. Two 

 small species, A. acicula and A. Inbrica, are found in Eng- 

 land, among the roots of trees at the base of limeston 



Achatina marginata. 



* Keeve's Iconiea. 



t ib. 



