36 BOOK OF SPECIES. 



ACHATINA. TERRESTRIAL. 



Ovate or oblong; aperture entire, elongated; lip 



acute, never reflected ; columella smooth ; the 



base truncated. 



* Last whorl ventricose, and not depressed. 



A. PERDix. Very large^ ovate-oblong, ven- 

 tricose, decussated, white ; apex rose - colour, 

 marked with longitudinal dark-chestnut flames ; 

 columella of a violet purple ; lip white within ; 

 sutures slightly crenulated. 5. W. 18. 53. 



A. ZEBRA. Very large, ovate-oblong, ventri- 

 cose, obsoletely decussated, and marked with 

 crowded, longitudinal, undulated, red and brown 

 lines or streaks ; lip white within ; sutures and 

 size as preceding. W. 18. 52. 



A. PURPUREA. Ovate, ventricose, cinerous, 

 covered with a yellow epidermis ; apex pinkish ; 

 mouth purple, both lips margined with brown ; 

 spire obtuse ; sutures crenulated. 4. W. 18. 

 54. 



A. VEXiLLUM. Ovate-conic, smoothish, most 

 minutely striated, variously coloured, banded, and 

 spotted ; whorls eight, rather convex ; columella 

 pink, by age black. 3. W. 18. 46. 



A. viRGiNEA. Ovate-conic, smooth, white, 

 elegantly girded by black and red lines; whorls 

 convex ; columella rose-colour ; lip purplish ash- 



