142 JOURNAL OF CONCHOLOGY. 



DESCRIPTIONS OF NEW SPECIES OF LAND SHELLS 

 FROM THE EAST COAST OF AFRICA. 



By JNO. W. TAYLOR. 



In continuation of former papers on this subject, based on 

 the collections formed by Mr. Gibbons in East Africa, and which 

 he kindly placed in my hands for identification, I have now 

 added five more species to those previously enumerated. 



The whole collection is of great interest, and I have ex- 

 perienced considerable pleasure in the task of examination- — a 

 pleasure that has been greatly intensified by the very full and 

 accurate descriptive notes kindly furnished me by Mr. Gibbons. 

 Helix dubia, n. s. (PL i, f i.) 



Shell depresso-conical, thin, color brownish? — faintly marked 

 in the line of growth with striulse : epidermis thin, distinct : whorls 

 4^, convex, gradually increasing in size to the last, which is 

 subcarinate, base very convex, spire depressed, apex obtuse : 

 suture distinct : mouth lunate, peristome thin and direct, rounded 

 — inner lip slightly reflected behind : umbilicus narrow but deep 

 and distinct. 



Length, o-i 12 ; breadth, 0-087. 



Occurs rather numerously among grass in a sandy place at 

 Zanzibar. I have not seen any live shells. 



Bulimus Bawriensis, n. s. (PI. i, f. 2.) 



Shell ovate-conical, somewhat turrite, moderately strong, 

 of a dark brown color and very finely striulate transversely : 

 epidermis moderate : whorls 5I to 6, very convex, inflected 

 towards suture, gradually increasing in size downwards — the 

 penultimate and body whorls are both large- — the latter how- 

 ever rather the larger : spire produced : apex rounded, small : 

 suture distinct : mouth oval, longer than broad : peristome 

 thickened — everted so as to form a broad flat margin — presenting 



