E. A. SMITH— MOLLUSCA. 45 



Only a single specimen is in the collection. It is, however, peculiar on account of 

 the absence of the dark irregular brown markmgs upon the last two whorls ; these 

 are covered with a yellow periostracum, beneath which the shell is white. A. tincta 

 Eeeve, A. weynsi Dautzenberg, A. buchneri Martens, and the present species are very 

 difficult to separate, all being characterized by a very similar style of coloration and 

 sculpture. 



6. BuKTOA JsriLOTiCA (Pfeiffer). 



Bulimus niloticus Pfeiffer, Proc. Zool. Soc. 1861, p. 24. 



a. Ruwenzori (no special locality given). 



Only one young shell was obtained. For further references, see Pilsbry, Manual of 

 Conchology, 2nd series, vol. xvi. p. 300; and for the anatomy, Reynell, Proc. Malac. 

 Soc. vol. vii. p. 97, pi. xvii. 



7. LiMicoLAEiA SATURATA Smith. (Plate I. figs. 1-4.) 



Limicolaria saturata Smith, Proc. Malac. Soc. vol. i. p. 324, fig. 1 on p. 323. 

 ? Limicolaria ventricosa Smith, 1. c. p. 324, fig. 2, abnormal. 



a-a . Ruwenzori (no special locality given). 



A fine series of specimens of this species indicates that it is very variable both in 

 colour and form. These differences can be shown only by means of coloured figures. 



One set of specimens is of the same rich dark colouring as the type, whereas another 

 set has quite light brown markings. One of the most constant features is the size of 

 the two or three apical whorls : these are rather small, so that the top of the spire is 

 slender in comparison with other species. I do not feel quite sure that L. ventricosa 

 is an abnormal example ; certain specimens in the present collection approach it 

 in shape, but none of them has the top whorls quite so broad. 



8. Limicolaria smithi Preston. (Plate I. figs. 5-7.) 



Limicolaria smithi Preston, Proc. Malac. Soc. vol. vii. pp. 89, 90, fig. 



a-f. Ruwenzori (no special locality given). 



Also recorded from the Uganda District {Preston) ; Bunjako, N. of Victoria Nyanza ; 

 between Entebbe and Fort Portal, Toro, Uganda ; Kibiro, east shore of Lake Albert. 



As pointed out by the author, this species is extremely variable in colour, and the 

 differently coloured shells appear to occur together in the same locality. 



Some specimens are white covered with a greyish-olive periostracum, and with 

 or without a blackish umbilical zone. Others have a dark infrasutural interrupted 

 band besides the basal zone. Some specimens, like the type, have the upper whorls 

 blackish-purple, or inclining to purplish-rose, or again quite pale. The finest example, 

 from Kibiro, east shore of the Albert Nyanza, is a very striking shell with broad. 



