ENNEA. 101 



the right margin, and a callous thickening at the base, lip white, 

 shortly subreflected. Length, 9 mill. 



Isle of Mayotte. 



Larger than the preceding species, and less cylindrical, aper- 

 ture more triangular, and teeth differing in size. 



E. PFEIFFERI, Krauss. PL 19, fig. 98. 



Rimate, somewhat solid, closely costulately striate, alabas- 

 trine, slightly scrobiculate at the base ; aperture with a parietal 

 lamina, a columellar tooth, another at the base, and a fourth, 

 sometimes bitid, on the right margin, lip thickened, shortly 

 reflected. Length, 5'5 mill. 



Gape of Good Hope. 

 E. LARVA, Morelet. PI. 20, fig. 28. 



Rimately perforate, very smooth, hyaline, white, base biscro- 

 biculate ; aperture with a parietal lamina, two teeth on the right 

 lip, one at the base, and a large laminar columellar plication, lip 

 callous, white, shortly expanded, margin sinuous. 



Length, 4 mill. 



Comoro Islands. 

 E. MODIOLIFORMIS, Morelet. PL 20, fig. 29. 



Rimately perforate, diaphanous, smooth, yellowish, suture 

 narrowly margined ; aperture with a compressed parietal lamina, 

 an obtuse, small columellar plica, a small tooth at the base, and 

 a punctiform tooth in the middle of the right margin ; lip 

 thickened, white, shortly reflected. Length, 18 mill. 



Comoro Islands. 

 E. TRIGONA, Morelet. PL 20, fig. 34. 



Profoundly rimate, smooth, somewhat shining, light corneous, 

 suture narrowly margined, last whorl scrobiculate ; aperture 

 with a parietal plica, a tooth on the' columella, and another on 

 the outer margin ; lip thick, sinuous, shortly reflected. 



Length, 6 mill. 



Comoro Islands. 

 E. SPRETA, Morelet. PL 20, fig. 36. 



Obliquely rimate, very slightly costulate-striate, scarcely 

 shining, corneous, last whorl obsoletely scrobiculate ; aperture 

 with a compressed median parietal plica, and a tooth on the 

 outer lip; lip somewhat thickened, constricted in the middle, 

 sinuous. Length, 5 mill. Comoro Islands. 



