68 



DESCRIPTIONS OF NEW SPECIES OF ENA, PSEUDOGLESSULA, 

 AND SUBULI.SA FROM BRITISH AND GERMAN EAST AFRICA. 



Ey Eduar a. Smith, I.S.O. 



Bead 8th January, 1904. 



Ena (Cerastus) Lagariensis, sp.n. Fig. I. 



Testa ovata, supra acuminata, solidiuscula, anguste umbilicata, 

 cornea vel fuscescens ; spira conica, ad apicem subobtusa ; anfractus 7, 

 superiores 2 J convexi, fere Iseves, caeteri minus convexi, lineis incrementi 

 costuliformibus obliquis instructi, inter costulas minute spiraliter 

 striati, sutura subobliqua sejuncti, ultimus antice oblique descendens, 

 costulis minus validis et striis transversis minute subgranosis ; apertura 

 inverse auriformis, intus fuscescens ; peristoma incrassatum, albidum, 

 rotunde reflexum, margine columellari ad insertionem leviter expanso. 



Long. 26-5, lat. 14 mm.; apertura cum perist. 11 -5 mm. longa, 

 9 lata. 



Hob. — Lagari, British East Africa, 469 miles up the Uganda 

 Railway. 



Three specimens of this species were collected at the above locality 

 by Mr. Steuart Betton, who presented them to the British Museum. 

 The species is closely allied to BuUminus rectirugis of Martens,' but 

 has the aperture shorter in proportion to the total length of the shell, 

 and lacks the curious malleation or wrinkling which is characteristic 

 of that species. The fine spiral striae are crossed by others in the 

 direction of the line of growth, so that the surface (especially of the 

 bodjr-whorl) has a very finely granose appearance under the lens. 

 This feature is not referred to as existing in B. rectirugis, which 

 moreover is described as red-brown. 



PsEUDOGLESSULA PrESTONI, Sp.U. Fig. II. 



Testa ovata, supra producta, tenuis, saturate olivaceo-fusca, semi- 

 pellucida ; spira ad apicem obtusa ; anfractus 7 oblique confertim 

 tenuiter costulati, mediocriter convexi, ultimus ad peripheriam carina 

 obtusa cinctus, infra carinam magis nitidus, costisque minus validis, 

 anticehaud descendens ; ayiertura inverse auriformis, intus cserulescens 

 vel opalescens, longit. totius fere * adaequans ; labrum tenue, arcuatum ; 

 columella tortuosa, antice incrassata, pallida, subtruncata, callo 

 tenuissimo labro juncta. 



Long. 28, diam. 13 mm.; apertura 12 mm. longa, 7 lata. Another 

 specimen is 30 mm. long and 13 broad. 



Hah. — Ukami, German East Africa, about 100 miles south-west 

 of Zanzibar. 



i " Weichthieie Ost-Africas," p. 60, pi. iii, tig. 25. 



