hitherto been overlooked as a variety of the Lainsean Bulla 

 Achatina ; the colour of both is subject to much variation ; but 

 this will be found at best a most indecisive and vague character 

 for specific distinction when unaccompanied by others more 

 important and connected with the formation of shells. I have 

 therefore not hesitated in making this a distinct species, from 

 having had the means of examining at different times near twenty 

 specimens, all of which presented the following characters. 

 Spire of five whorls, the last or terminal one very small and 

 flattened ; the apex obtuse ; the suture depressed, as if flattened 

 on the shell, and margined by one or sometimes two indented 

 lines, parallel, and at the top of each whorl. In the colour of its 

 mouth it varies in sometimes having a tinge of rose-colour at die 

 base and top of the spire, but the mouth is more generally white. 

 The body whorl is more or less ventricose ; the outer lip is a 

 little reflected, and the whole shell, when full grown, much thicker 

 and heavier than any of the other species. The epidermis is 

 yellowish- brown, beneath which the shell is nearly white, beau- 

 tifully marked with broad remote stripes of chesnut, with others 

 more slender (and sometimes broken into spots) between. I have 

 another specimen which agrees tolerably with Lister's figure in 

 being more than usually ventricose, and which I think is acci- 

 dental. The only constant variety appears to be that figured by 

 KnoiT, ii. tab. 3. fig. 1. having the spire entirely rose-colour. 



The marginal line and the correct number of whorls in the 

 spire are well expressed in the figures of Lister, Gualtieri and 

 Knorr. The first of these figures is accidentally more ventricose; 

 the second, like all the other figures of Gualtieri, is defective at 

 the apex ; and Knorr's I suspect has been outrageously coloured 

 from the real pink-mouthed Achatina. 



It inhabits the coast of Guinea ; and I am informed the ani- 

 mal is eaten by the natives. 



