108 



are knorni to bave in determining the intensity or distribution of its 

 colour. 



The bod)'-whorl of No. 1 . is, generally speaking, more ventrlcose 

 and deeper than that of any of the other varieties; and when No. 1. 

 and No. 4. are placed side by side, the discrepancy may appear 

 somewhat staitling j but if the gradations be placed before us, these 

 differences vanish, or are so melted down into each other that no- 

 thing remains fixed but the number ofvvhorlSj the style of sculp- 

 ture, the relative size of the umbilicus, and the general form and 

 tnake of the shell. 



Mr. Cuming found all his specimens under stones. — W. J. B. 



BuLixus MUTABiLis. Bul. tcstd cylindrico-ūttenuatd, subalbidd 



castaneo strigato-maculatd ; anfractibus 7 creberrimk granuloso- 



striatis ; umbilico mediocri ; epidermide fuscd : long. \^, lat. 4 



poli. 



Hab, in montibus Peruviae. (Santos.) 



Var. albo castaneoąue alternatim fasciata^ fasciis castaneis albo 



maculatis : long. J^, lat. 4- poli. 

 Hab. in Peruvia. (Campania of Truxillo.) 

 Both these varieties were found under stones. 

 The sculpture is very like that of the preceding species, but much 

 finer and closerj and indeed there is a general resemblance at first 

 sight; but the number of whorls, the cylindrical shape, and other 

 points in the species before us, sufBciently mark the difference 

 between them. — W. J. B. 



BuLiNūs VERSicoLOR. Bul. testd ovato-pyratnidali, albidd maculia 

 castaneis, vel castaned maculis albidis varid ; anfractibus 6 minu- 

 tissime longitudinaliter subdepresso-granuloso-striatis ; labio ex- 

 teriore albente ; fauce subnigro-castaned ; umbilico mediocri; epi- 

 dermide tenui : long. 1-į-, lat. ^poll. 

 Var. fascia albida basali. 



Hab. in montibus Peruviae. (Mongon, near Casma.) 

 This shell varies in its colouring almost as much as Bul. multicolor, 

 King {Helix muUicolor, Rang), and bears some resemblance to that 

 species at first sight. On examination, the difference between the 

 two species is very apparent. The whitish basai band of the variety 

 is seen internally as vvell as externally. 

 Found on bushes. — W. J. B. 



