PART II. 



ACHATIN^:. 335 



gined and reflected; aperture without teeth, rarely 



with a single fold.* 

 Auricula Lam. Body-whorl sub-ventricose ; spire 



short ; the whorls few ; pillar with one or two plaits ; 



outer lip margined and reflected. 

 Sileni. En. M<th. 460. f. 4. leporis. Lam. (fig. 27. p. 181.) 



Bulimus Lam. Outer lip thickened and reflected ; 

 spire short ; pillar smooth, 

 melanostomus. Zool. 111. i. 4. Australis. Bow. C. 8. f. 30. 



Bulimulus Leach. Outer lip thin, or sub-reflected; 

 spire equal or rarely longer than the aperture, 

 undulatus Guild. Zool. J. iv. 169. Antiguensis. Ib. 

 stramineus. Ib. iv. 1 70. Proteus. Ib. 



Leptospira Sw. Spire excessively long, sub-cylindrical ; 

 body-whorl largest; outer lip thickened; aperture 

 oval ; no teeth, 

 striata Sw. Chm. 135. f. 1226. signata Sw. (fig. 97. a, 6.) 



Goniostoma Sw. Spire elongated, of few whorls ; aper- 

 ture contracted at each end ; lips margined ; the 

 pillar curving inwards ; the base slightly notched. 

 T. erubescens Sw. Zool. Journ. i. pi. 5. f. 2.f 



3. ACHATINA. Outer lip always thin; base of the 

 pillar truncated, or sinuated, before it joins the outer 

 lip. 



Macrospira Guild. J Spire excessively long, sub- 

 cylindrical ; body- whorl largest ; outer lip thin ; 

 aperture oval. 

 M. octona. (Helix octona Auct.) aperta Guild, (fig. 97. e,f.) 



Cochlycopa\ Fer. Oblong; body- whorl slender; sur- 

 face striated ; spire variable ; outer lip with a promi- 

 nent lobe near the base. 



C.glans. Chem. 117. f. 1009, 1010. 



* Only in Auricula. 



f The singular lateral position of the aperture is not expressed in thi 

 figure. See fig. 25. p. 177. 



J Subsequently named, inadvertently, Chionetta, by Mr. Jeffreys. 

 I Very properly substituted by Ferussac for Polyphemus. 



