I.-^6 gibbons: new east AFRICAN LAND SHELLS. 



DESCRIPTIONS OF TWO NEW SPECIES OF LAND 

 SHELLS, AND REMARKS ON OTHERS COLLECTED 

 ON THE EAST AFRICAN COAST. 



By J. S. GIBBONS, M.B. 



In the first volume of this journal eleven species of land and 

 fresh water molluscs, collected at Zanzibar and Mozambique, were 

 described as new by the editor/'^ I now add two more species 

 previously overlooked, and take advantage of this opportunity to 

 make a few remarks on other species already recorded from East 

 Africa, but about which further information may be useful. I may 

 mention that I paid but little attention to the land shells when 

 out there, otherwise there is no doubt a much larger number of 

 species would have been obtained. The intense heat makes shell- 

 collecting inland very unpleasant, and one naturally prefers the 

 water, where the air is cooler and shells obtained more readily and 

 in greater numbers. 



Urocyclus fiavescens, Keferstein. 



Parmarion fiavescens, Keferst. Malak. Blatt., 1866, p. 70 

 (fide W. G. Binney, MS.) 



Body slender, tapering, keeled, tail sharply pointed — on 

 each side of dorsum a slight and rounded ridge runs from shield to 

 tail; surface longitudinally sulcate, color dark orange, keel and 

 lateral ridgeslight lemon, the sulciand their anastomosing branches 

 dusky; head and neck semipellucid, latter slender; shield anterior, 

 elongate, very convex from side to side, thin and rounded in front, 

 bluntly rostrate behind, a large swelling of the posterior part indi- 

 cates the situation of the shell, the apex of which is sometimes visible 



■^^ Q.J.C, i., pp. 251, 2S0, 379- 



J.C., ii.. May, 1S7* 



