102 ENNEA. 



E. COSTULATA, Morelet. PL 20, fig. 38. 



Concavely rimate, crystalline, plicately costulate ; aperture 

 with a compressed parietal plica, a tooth near the base of the 

 columella, and a third on the middle of the right margin. 



Length, 3 mill. Ins. Mayotte. 



E. HORDEUM, Morelet PL 20, fig. 54. 



Rimately perforate, thin, shining, lightly costulate, whitish ; 

 aperture with a bipartite parietal lamella, approaching a tooth 

 on the outer margin, and a scarcely conspicuous basal tooth 

 near the columella; lip shortly expanded, slightly reflected. 



Length, 5 mill. Comoro Islands. 



E. SULCIFERA, Morelet. PL 20, fig. 60. 



Superficially rimate, slightty plicatulate, shining, darkish horn- 

 color, suture slightly shortly denticulate, last whorl scrobiculate; 

 lip with parietal lamina, and a small tooth on the middle of the 

 right margin; lip shortly expanded, constricted in the middle. 



Length, 4*5 mill. Comoro Islands. 



E. ORYZA, Morelet. PL 20, fig. 61. 



Rimate, minutely costulate, shining, light fulvous ; aperture 

 with a parietal lamella, and a tooth on the right margin, lip 

 callous, a little expanded, exterior margin subsinuous. 



Length, 3-5 mill. Comoro Islands. 



E. CRASSTLABRIS, Craven. PL 20, figs. 50, 51. 



Perforate, opaque, yellowish white, finely closely obliquely 

 costulate ; aperture with a prominent parietal lamina, a strong 

 tooth on the outer margin, and a deep-seated columellar plica- 

 tion ; lip thickened, expanded and reflected, a pit behind the 

 labrum corresponding with the tooth within. Length, 1T5 mill. 



Leydenburg, Transvaal, So. Africa. 



E. INFANS, Craven. PL 20, figs. 55, 56. 



Perforate, semitransparent, yellowish brown, glossy, obliquely 

 lirate, faintly spirally striate between the lirae, suture somewhat 

 denticulated ; aperture with a large, straight parietal lamella, 

 labrum with a strong tooth, and corresponding exterior depres- 

 sion ; lip white, expanded, reflected. Length, 5-5*75 mill. 



Leydenburg, Transvaal, So. Africa. 



More c} T lindrical and differing in the dentition of the Aperture 

 from E. crassilabris. 



