AURICULA. BULIMUS. 



181 



with the Turhidce. Certain it is, that these animals (made 

 known by the excellent figures of the French voyagers) 

 are very different from the Auricula undulata; they have 

 only two short and depressed tentacula with basal eyes, 

 as in Fedipes*, instead of the usual structure of these 

 organs common alike to Auricula undulata and Bulimus 

 hiBmastomus. On these reasons do we restrict the sub- 

 genus Auricula to the characters above 

 stated — at least, until further inform- 

 ation leads to a different conclusion.. Of 

 all the species of Auricula here named, 

 the Auris-Leporis (^fig. 27.) is the most 

 remarkable ; the plait on the pillar is not 

 real, inasmuch as it is not solid, but 

 formed by a sharp angle of the body- 

 whorl round the umbilicus; the aperture 

 is large, and so oblique as to appear dis- 

 torted. It is by this shell that we pass to the sub- 

 genus Goniostoma already mentioned {fig. 25.). The 

 five sub-genera of Bulimus will thus form a circle, and 

 present us with the following analogies : — 



Analogies of the Sub-Genera o/" Bulimus. 



Genera Sub-genera 

 of the of 



TurbidiB. Bulimus, 



TORBO. 



Bulimus. 



TURRITELLA. BulimulUS. 



ScALARiA. Leptospira. 



Analogical 

 Characters. 



r Body-whorl large, T 

 -? ventricose; spire > 



more") 



Genera 



of 



Achatints. 



, -, Bulimus. 



C short 

 Body, whorl 

 ' Mider; outer 1 



in, or very 

 slightlyreflected, 

 r Spire excessively! 

 < long; body-whorl > Clausilia 



r Body. whorl more") 

 3 slender; outer lip f 

 1 thin, or veryl^ 

 (. slightlyreflected. 3 



Scissurella. Gonyostoma. 



Melampus. Auricula. 



Sub-genera 



of 

 Achatince, 



AchatineB. 



Achatina. Cochlicopa. 



small. J 



r A slight notch or^ 

 3 channel at thef 

 j base of the aper- T 

 C ture. 3 



r Outer lip dilated 

 i the margin J- Cyclostoma 



L spreading. 



Macrospira 



Helicina. Leucosfoma? 



* See an admirable memoir upon this genus by Mr. Lowe, in the Zoologi. 

 cal Journal, No. xix, p. 28U. 



N 3 



