182 ]\Jr. H. B. Preston on new She/' Is from 



in colour flian the rest of the shell ; sutures impresseil, mar- 

 gined, whifi.sh ; umbilicus narrow, deep, partly concealed by 

 the reflexed columella; peristome thin, acute; aperture 

 oblique, broadly lunate. 



Alt. 6*5, diam. maj. 13*5 mm. 



Aperture : alt. 5, diam. 5'5 mm. 



lli-b. Bitze, near the River Ja, Cameroons, 



Type in British Museum. 



A very variable species ; one specimen is of a much darker 

 colour than tlie otiiers submitted to me, and the margin of the 

 suture, instead of being whitish, is of even a deeper shade of 

 reddish brown than the rest of tiie shell ; another is soinew'nat 

 lar<ier and Hatter in proportion than the type, but 1 am 

 unable to separate them specifically. 



Achatina dacostana, sp. n. (Fig. 7.) 



Shell ovate, pale brownish yelloM', painted with very 

 indistinct greyish Hame-markings, especially noticeable on 

 the fourth and fifth whorls, and bearing traces of having been 

 covered with a very thin greenish-brown ])erio3tracum ; 

 whorls 6^, flattish, tiie upper finely granular, ihe last coarsely 

 granular above the periphery, smooth and shining below ; 

 sutures impressed, crenulate ; aperture ovate; peristome 

 acute ; columeUa descending obliquely and spreading into a 

 thin callus which joins the upper margin of the peristome. 



Alt. 75, diam. maj. 37"5 mm. 



Aperture: alt. 3?!>, diam. 22 mm. 



JJab. East Africa. 



Achatina suhci/lindrica, sp. n. (Fig. 8.) 



Shell thin, subcylindrical, ))ale greenish yellow ; whorls 

 7^, regularly increasing, slightly convex, finely granular 

 except on the lower half of the last whorl, which is smooth ; 

 apex obtuse, somewhat flattened ; sutures well impressed, 

 lightly crenulate; columella descending in a curve; pv^ri- 

 stome thin, acute ; aperture inversely auriform. 



Alt. 38*5, diam. maj. 13"5 mm. 



Apeiture: alt. 13, diam. 7 mm. 



Hab. Natal. 



Allied to Achatina transvaalensis. Smith *, but differing 

 chiefly in its more cylindrical form, flatter whorls, and rather 

 cuarr^er sculpture. 



* Juurn. Conch, vol. i. pp. 351 352. 



