SMITH : ON NP:w land-shells from east AFRICA. 



69 



This species is very like P. Ivirki, Craven, but diifers in form and 

 in having one whorl less. The spire in that species is a trifle more 

 slender, the bodj^-whorl smaller, and the columella is so reflexed as 

 to form a narrow umbilical fissure. There is also the difference of 

 colour in the two forms. Named after Mr. H. B. Preston, from whom 

 the specimens were obtained, 



PSEUDOGLESSULA GRACILIOR, Sp.U. Fig. III. 



Testa P. Prestoni similis, sed angustior, elongata, dilute fuscescens; 

 anf ractus 8 eonvexiusculi, oblique tenuiter costulati ; apertura longit. 

 totius \ paulo superans. 



Long. 28, diam. 11 -5 mm. ; apertura 10 mm. longa, 6 lata. 



Var. : testa pallide viridi-olivacea. 



Hab. — Same as P. Prestoni. 



The two forms of Pseudoglessula here described, together with 

 P. Kirkij Craven, and P. Leroyt, Bourguignat, form a little group of 

 species which are all closely related, having the same character of 

 sculpture, form of aperture, and columella, and differing principally 



II. 



III. 



in their general form and tone of coloration. A featui'e common to 

 all is a faint carination around the middle of the body-whorl, and 

 a more glossy surface below it. P. graciiior is the most slender of all 

 the forms, and P. I'restoni the broadest. P. Leroyi has nine whorls, 

 P. graciiior and P. Kirki eight, and P. Prestoni only seven. With 

 the exception of P. Kirhi, which is often banded, all the species are 

 of an uniform tint, varying from light brown to a dark olive brown. 

 P. subcarinifera, Smith, is a diminutive form belonging to the same 

 group. 



SuBULiNA Lagariensis, sp.n. Fig. IV, 



Testa elongata, subtenuis, sub epidermide tenuissima lutescente 

 albida ; spira producta, ad apicem mammillata ; anfractus 9 eon- 

 vexiusculi, lineis incrementi tenuibus leviter obliquis sculpti, 3-4 

 ultimi spiraliter striati, plus minus decussati ; apertura inverse auri- 

 formis longit. totius \ baud aequans ; labrum tenue, arcuatum ; 

 columella subtortuosa, callo tenuissimo induta, antice anguste truncata. 



Long. 31, lat. 10 mm. ; apertura 9-5 mm. longa, 5 lata. 



