ACHATINA melastoma, 

 Black-mouthed Achatina. 



Generic Character. — See PI. 30. 



Specific Character. 



A. testd sfrigis longitudinalibus, nebulosis, purpureis ornatd ; spird 

 elongatd t labio exteriore castaneo-nigro ; columelld crassd, 

 gibbd ; basi integrd. 



Shell with clouded purple longitudinal stripes ; spire lengthened ; 

 inner lip chesnut-black ; columella thickened, gibbous; base 

 entire. 



Var. (reversed.) A. perversa. Zool. Illust.vol. l./?Z. 30. 



I HAVE not the least doubt that this shell is specifically the 

 same with that figured at Plate 30 of this work : it has only 

 recently come under my inspection, and I therefore hasten 

 to give a further illustration of this beautiful species, and to 

 substitute a new specific character, which will be applicable 

 to both varieties. 



Although much more ventricose than the reverse variety, 

 this has the same unusual formation of that part of the 

 columella seen at the base of the mouth, where it is very 

 thick, and appears as if swelled: the epidermis, in this 

 specimen, obscures the white ground colour of the shell. 

 I have seen also another variety, even more slender than 

 that at Plate 30, and with the aperture not reversed. These 

 new facts point out the necessity of the specific name of 

 perversa being changed to one more applicable. 



The figure is from a specimen lent to me by Mr. Dubois, 

 and is probably from Brazil. 



PI. 152. 



