puEsroN : ox new speciics of limicolaria. 279 



sculptured with rather coarse, transverse wrinkles, crossed by spiral 

 striae, thus presenting a finely decussate appearance ; the later 

 whorls somewhat nialleated and having the transverse wrinkles 

 chiefly confined to the subsutural region ; suture impressed, slightly 

 crenellated by the terminations of the subsutural wrinkles ; columella 

 descending rather vertically, livid, very finely granulate, and reflexed 

 over the very narrow perforation ; labrum acute, simple, reddish 

 chestnut; aperture inversely auriform; interior of shell whitish, 

 showing the chestnut bands through the test. Alt. 57 mm. ; diam. 

 raaj. 23-5, min. 21-5 mm. Aperture: alt. 23, diam. 11 mm. 



Rah. — Rumruti, Laikipia Plateau, at an altitude of 7,000 feet, 

 British East Africa (Robin Kemp). 



The present species would appear to be identical with the specimen 

 in the British Museum which was quoted by Dohrn ' in his list of 

 mollusca collected by the Speke Expedition as Z. tenebrica, Reeve ; ' 

 the present species, however, is totally unlike the type of that 

 species, which is also in the British Museum, and I therefore take 

 the present opportunity of describing it. 



LmicoLAEiA Percivali, n.sp. 



Sliell allied to L. Smithi, Preston,^ but more elongate, and with 



one whorl more ; the whorls are more convex, and the last slopes less 



at the base ; the aperture is proportionately much shorter and rather 



broader ; the columella descends almost vertically and is more widelv 



reflexed ; moreover, the labrum is angled above and below, which is 

 not the case with L. Smithi. Alt. 59-5, diam. maj. 22-5 mm. 

 Aperture : alt. 27, diam. 9'25 mm. 



Hab.—R\it Valley, British East Africa (A. Blayney Percival). 



^ Proc. Zool. Soc. Lond., 1864, p. 116. 



- Keeve, Conch. Icon. (Bulimus), pi. liii, fig. 347. 



* Proc. Malac. Soc. Lond., vol. vii, pp. 89-90. 



VOL. X. — M.ARCH, 1913. 19 



