ACHATINA marginata, 

 Marginated Achatina. 



Genekic Character. 



Testa ovata, tcl ohlongo-ovata, spira elevatn, apertura suhovalc. Coliunella 

 Icevls, simplex, ad apicem truncata; labium externum tenve, internum 

 injiexum integrum ; umbilicus mdlus. 



Typus GenericLis Bulla Achatina. Linn. 



Shell ovate, or oblong-ovate ; spire elevated ; month nearly oval. Colu- 

 mella smooth, simple, truncated. Outer lip thin; inner lip entirely 

 inflexed. Umbilicus none. 



Generic Type Bulla Achatina. Linn. 



Specific Character. 

 A. testa ovato-oblonga, strigisincequalibusferrugineis; spira ad apicem obtusa, 



b-voluta ; siitura depressa linca stdcata marginali. 

 Shell ovate-oblong, with irregular ferrugineous stripes ; spire obtuse at the 



top, of five volutions ; the suture depressed, wtli a marginal mdented 



line. 

 Lister 579. fig. 34. Gualt. pi. 45. B. Knorr, vol. iv. tab. 24. 1. (hadly 



coloured.) 



1 HE largest shells hitherto discovered as inhabiting the dry land 

 belong to this genus, instituted b}' the celebrated Lamarck, but 

 still divided by the strict followers of Linnjeus between the Bidlce 

 and Helices, with a singular infelicity of even artificial arrange- 

 ment. The simple characters peculiar in a greater or less de- 

 gree to all, will readily distinguish them ; and I apprehend most 

 of the species of the first division (which includes the present) 

 will be found to inhabit only the African continent, while Bulla 

 virginea and the smaller shells placed in the second division arc 

 found principally in the new world ; where also two or three 

 gigantic species of Bulimus occupy the place of the larger Afri- 

 can AchalitKC. 



Of these, the shell now figured is one of the rarest, and has 

 PI. 30. 



