216 MR. H. B, PRESTON ON AGNATHOUS 



Ennea percivali, sp. n. (PI. XXXV. figs. 5, 5 a.) 



Shell allied to U. suavissima, but clifFering in its much smaller 

 size, proportionately more elongately cylindrical form, more 

 convex lower whorls, and in possessing half a whorl more ; it is 

 narrowly perforate, and the columella, which is not twisted, is 

 somewhat broadly expanded above ; moreover, the aperture is less 

 rhomboidal in shape than in E. suavissima. 



Alt. 5-75, diam. maj. 2"5 mm. 



Aperture: alt. TTS, diam. -75 mm. 



Hah. Mt. ISTyiro, to the south of Lake Rudolph, at an altitude 

 of 8300 feet {A. Blayney Percival). 



Ennea viatoris, sp. n. (PI. XXXY. figs. 14, 14 a.) 



Shell large, cylindrical, pale yellowish brown ; whorls 8, the 

 first five regularly increasing, the sixth increasing very little in 

 breadth, the last two slightly decreasing in breadth, sculptured 

 with closely-set, rather fine, oblique, transverse costulge ; suture 

 lightly impressed ; perforation narrow, partly concealed by the 

 outward expansion of the columella ; columella vertically de- 

 scending, outwardly expanded ; labrum somewhat broadly dilated 

 and narrowly reflexed except near the upper margin where it is 

 rather contracted ; aperture subrhomboidal, armed with a coarse, 

 oblique, erect, parietal lamella, two rather weak lamellae on the 

 inner margin of the outer lip, of which the lower is the coarser, a 

 basal denticle situate well within, and a rather broad, projecting, 

 tooth-like lamella on the columella. 



Alt. 12-25, diam. maj. 5*75 mm. 



Aperture : alt. 3-5, diam. 2 mm. 



Hah. Mt Nyiro, to the south of Lake Rudolph, at an altitude 

 of 8300 feet [A. Blayney Percival). 



Ennea syngenes, nom. nov. for Ennea consobrina Preston, 

 non Ancey. 



Mr. J. R. le B. Tomlin having kindly pointed out to me that 

 the above name used by me in the ' Annals and Magazine of 

 Natural History,' vol. vii. 1911, p. 463, is already preoccupied*, 

 I now venture to propose the name " syngenes" as a substitute. 



Ennea (Ptychotrema) kombaensis, sp. n. (PI. XXXIY. 

 figs. 4, 4«.) 



Shell cylindrical, moderately solid, yellowish white ; whorls 5, 

 the first three regularly increasing, the fourth proportionately 

 much longer, the fifth, though increasing in length, slightly 

 decreasing in breadth, sculptured with somewhat coarse, oblique, 

 transverse plications ; suture impressed, crenellated by the 

 terminations of the ti-ansverse plicae ; umbilical area represented 

 by a narrow, elongate, shallow depression ; labrum continuous, 

 white, porcellanous, outwardly expanded, and, except along the 



* ' British Naturalist,' 1892, p. 125. 



