152 Mr. E. A. Smitli oi Land- and 



conical form, very narrow perforation, and the minute spiral 

 striation upon the apical whorls, which becomes obsolete on 

 the few last. The acute keel at the periphery passes up the 

 spire just above the suture, but does not reach beyond the 

 fourth volution. The apical whorls are considerably convex 

 and probably are not carinate at the middle. The three 

 specimens at hand have a dirty appearance, through the 

 presence of more or less blackish earth, which appears to be, 

 as it were, gummed to the surface. This may possibly be a 

 characteristic feature of the species. 



Trochonanina episcopalis. (PI. V. fig. 4.) 



Testa ang.u8te perforata, tenms, bredter conoidea, ad peripheriam 

 subangulata, vel obtuse carinata, pallida fusco-cornea, interdum 

 liiiea angusta rufa supra angulum anfr. ultimi cincta ; anfr. G-7, 

 apicales duo laeves, politi, convexi, cajteri convexiusculi, regula- 

 riter acerescentes, striis obliquis curvatis aliisque concentricis 

 microscopicis sculpti, quasi subsericati, inferne ad suturam an- 

 gusta carinato-marginati, ultimus interna magis politus, liueis con- 

 centricis, tenuibus, confartis, minute undulatis, ornatus, lineis 

 incrementi radiautibus, tenuibus, scnlptus, hand descendens ; 

 spira mediocriter elevata, superne submammiformis ; apertura 

 obbque scmilunata ; perist. tenuissimum, margine columellari ad 

 rimam breviter axpanso. 



Diam. maj. 17J millim., min. 15| ; alt. 12. 



Hah. Usagara. 



This species is closely related to T. Jenynsi of PfeifFer, 

 but may be distinguished by its colour, the less acute peri- 

 phery, and the finer spiral striae on the upper surface. The 

 typical form of T. Jenynsi is an opaque white shell with a 

 brown zone above the periphery and distinctly spirally striated 

 on both the upper and lower surfaces. T. ept'scoj^ah's is more 

 transparent, of a brownish horn-colour, and sculptured on the 

 upper surface with excessively fine spiral striation. 



This species was collected by Bishop Hannington, who 

 lost his life a few years ago at the hands of some of the 

 natives in East Africa. 



BuUmus {Rhachis) usagaricus. (PI. V. fig, 5.) 

 Testa ovato-conica, angusta perforata, tenuis, albida vol dilute 

 flavesccns, linais spiralibus paucis fusco-nigris punctisque uigres- 

 ccntibus sparsis picta ; anfract. 0, couvexiusculi, striis incrementi 

 tenuibus obliquis, aliisque spiralibus minutis, sculpti, tres api- 

 cales plerumque fusccscentes, ultimus magnus, convexus : aper- 

 tura longit. totius 4 aoquans ; perist. tenue, margine columellari 

 siipcrno expanso et rcflexo. 

 Longit. Ki^, millim., diam. 10: ajicrtura ^^ longa, n lata. 



