180 'Mv. Tl. R. Preston on new Shells from 



Fi(j. 7. Imperfect head of Nerlnides (?) lumellata, with tlie short pro- 

 boscis extended. Enlarged. 



Fi(/. 8. Ventral stiirijristles of the same. X Zeiss oc. 4, obj. D. 



J 'if/. 9. AntenoT end of Kinherffclla plumosa. Enlarged. 



Fiff. 10. Ventral hook from the IGth foot of the same species, x Zeiss 

 oc. 4, ohj. D. 



Plate VI. 



Fiff. 1. Dorsal bristles of the 10th ioot oi NerinideslameUata. x Zeiss 

 oc. 4, obj. U. 



Fig. 2. Winged bristle of the dorsal division of the same foot, x simi- 

 larly. 



Fii/. 3. Ventral bristles of the 10th foot. X similarly. 



Fifj. 4. 25lh foot of the same .species. X similarly. 



Fig. 5. 60th foot of the foregoing. X similarly. 



Fiys. 6 & 7. Different views of the 4th foot of Kiyihergella plumosa. 

 X 48 diam. 



Fiff. 8. 10th foot of the foregoing form. X similarly. 



Fiff. 9. 10th foot of Scolecolt'jns I. X about 34 diam. 



XX T, — Descriptions of Seventeen new Species and Varinties 

 of Laud and Freshwater Shells from East and West Afiici 

 and the Transvaal. By H. B. Preston, F.Z.S. 



[Plate VII.] 



Having recently liad tlirouo;h my hands a number of land and 

 iresliwater shells from the German Cameroons, and finding 

 among them a number of forms which seem to have hitherto 

 escaped notice, I venture to describe them in the present 

 paper ; at tlie same time 1 take the opportunity of describing 

 i\vo species of Fischeria from Senegal, collected in that region 

 by Colonel M. Messager, and two species of Achatina from 

 E, Africa and the Transvaal respectively, as also a variety of 

 Achatina variegata, Lk,, from W. Atiica, which, being con- 

 stant and well-marked in form, 1 have thought worthy of a 

 varietal name. 



Gihhus (Edentulina') confusa, sp. n. (Fig. 1.) 



Shell ovate-elongate, rather laterally compressed, thin, 

 white, somewhat sliitiing, semitransparent, rimate ; whorls 5^, 

 sculptured with very tine oblique transverse lines, veri/ 

 minutely hut closely puhctate throughout, the latter portion of 

 the last whorl somewhat ascending; sutures linear; colu- 

 mella descending obliquely above, excavated below, outward!}' 



