198 MR. H. B. PRESTON ON AGNATHOUS 



breadth, the fourth also increasing in length, but slightly dimin- 

 ishing in breadth, the fifth increasing in length and again in 

 breadth to equal that of the third, the sixth increasing in length 

 but not in breadth ; suture impressed, narrowly margined below ; 

 columella rather obliquely descending, white, porcellanous ; 

 labrum white, narrowly, outwardly expanded and reflexed except 

 near the upper margin, where it becomes almost acute ; aperture 

 subquadrate, edentulate. 



Alt. 6" 75, diam. maj. 3 mm. 



Aperture : alt. 1-5, diam. 1 mm. 



Hah. Urguess, British East Africa (^A. Blayney Percival). 



Ennea baccata, sp. n. (PI. XXXII. figs. 10, 10 a.) 



Shell cylindrically ovate, cream-coloured ; whorls 8, the first 

 very small, the second large in proportion, the third, fourth, fifth, 

 and sixth regularly increasing in length and breadth, the seventh 

 increasing in length, but not in breadth, the eighth increasing in 

 length, but diminishing in breadth, sculptured, especially on the 

 upper whorls, with fine, slightly oblique, closely set, transverse 

 strife ; suture lightly impressed ; umbilical area presenting a 

 narrow depression ; columella not very obliquely descending, 

 spreading above into a very thin, almost imperceptible, but well- 

 defined, parietal callus which reaches to the upper margin of the 

 labrum ; labrum sinuous, outwai'dly expanded, especially at the 

 base, reflexed ; aperture armed with an erect, oblique, parietal 

 lamella situated very near the upper margin of the labrum, a 

 rather coarse lamella-like projection on the outer lip, a small 

 nodulous basal denticle at the foot of the columella, above which, 

 and rather more exteriorly situate, occurs another and stronger 

 nodulous denticle, and above this again a rather broad, very 

 interioi'ly situate, columellar pi'ojection. 



Ait. 6, diam. maj. 3 mm. 



Aperture : alt. 1"25, diam. '75 mm. 



Hab. Urguess, British East Africa, at an altitude of 6000 feet 

 (^A. Blayney Percival). 



Ennea arthuri, sp. n. (PI. XXXII. figs. 9, 9 «.) 



Allied to E. baccata, but much smaller, with more obtuse apex ; 

 it has one whorl less, the first four increasing regularly, the fifth 

 proportionately in length, but not in breadth, while the sixth and 

 seventh increase also in length, but diminish in breadth ; the 

 surface is quite smooth, polished and shining, without any trace 

 of the transverse striie which are characteristic of E. baccata; 

 the suture is narrowly margined above., the labrum is not sinuous, 

 the columella is much more oblique and lacks the internal pro- 

 jection on the upper part which is so well developed in that 

 species. 



Alt. 7*25, diam. maj. 3*75 mm. 



Aperture: alt. 3, diam. 1*5 mm. 



Hah. Jombene Hills, British East Africa, at an altitude of 

 4000 feet (^4. Blayney Percival). 



