ACHATINA virginea, var.daudi. 



Generic Character. — See PI. 30. 



Specific Character.— See PI. 122. 



A. virginea, var. 3. testa ampliore, alhescente, fasciis rufis nigrisqne 

 ornatd ; aperturd purpurea ; labio interior e albo. 



Var. 4. testa ampliore, albd, fasciis 3 angusfis, fuscis ornatd ; aper- 

 turd labioque interiore albis ; anfractu basalt medio subcarinato. 



A. virginea, var. 3. Shell larger, whitish, with rufous and black 

 bands, aperture purple ; inner lip white. Middle Jigvres. 



Var. 4. Shell larger, white, with three narrow brown bands ; aper- 

 ture and inner lip white ; basal whorl in the middle slightly 

 carinated. Upper and lower figures. 



1 HE two varieties of A. virginea on this plate, are still more 

 removed from the type of the species than those last figured ; 

 they are both much larger in size, and var. 4 presents a 

 slight difference of formation, in having; the basal volution 

 somewhat carinated round the middle ; but as in every other 

 essential character it agrees with the rest, I have refrained 

 from separating it as a distinct species. 



The four varieties I have now illustrated of Ach. virginea, 

 tend to establish, in a very complete manner, the correct- 

 ness of the principles on which I have framed the specific 

 characters of this genus ; here are four shells, with a total 

 difference in the colouring of each, yet all agreeing in the 

 same formation. It should be observed likewise, that A. 

 pallida, figured at pi. 41 of this work, and A. virginea, var. 4, 

 are nearly the same in colour, while in formation they ai'e 

 completely at variance. I do not think it has been hitherto 

 remarked, that the elegant green lines which ornament the 

 common variety, are only external; they resemble, in this 

 respect, the epidermis of other shells, for they may be 

 taken off by a knife without any injury to the enamel. M. 

 Ferrusac has figured several other varieties in his beautiful 

 work on Land Shells. 

 PI. 123. 



