190 PNEUMONOBRANCHIATA. 



Azeca Goodalli. Fer. ; Alder, Mag. Zool Sf Bot. 



ii. 110. 



Azeca Matoni. Turton, Man. ed. 1. 68. f. 32. 

 Carychium Menkeanum. Pfeiffer, 70. t. 3. f. 42. 

 In woods, damp closes, under moss, among de- 

 cayed leaves, and in thick shady places. 



Animal brownish black, shining; upper tentacles 

 cylindrical, club-shaped. 



Shell two tenths of an inch long, and a third part 

 A as broad, oblong or conico-cylindrical, brown 

 H horn-colour, semitransparent, quite smooth and 

 glossy, except close to the sutures, where there 

 appear some fine longitudinal striae ; spire com- 

 posed of seven flat and hardly raised volutions ; 

 aperture pear-shaped, curved, and narrower at the 

 upper and outer angle ; the peristome thickened and 

 obtuse. 



This shell varies in shape, size, and colour, being 

 sometimes transparent greenish white, from want of 

 substance and colouring matter. It also varies in 

 having one or two additional small teeth in the peri- 

 stome alternately with the larger ones. 



10 ACHATINA Lam. (Agate Shell.) 



Animal like Bulimus, with four tentacles and an oval- 

 oblong, or somewhat cylindrical shell, obtuse at 

 the tip; aperture longitudinal, oval; the outer 

 lip thin, without any internal rib, and never re- 

 flected; pillar smooth, simple, truncate in front. 



The abruptly truncated termination of the pillar 

 or inner lip of the shell will immediately distinguish 

 this genus from Bulimus, to which it is in other cha- 



