GO STREPTAXID^E. 



Section EDENTULINA, Pfeitfer, 1855. Conical ovate, with 

 tapering spire and blunt apex, smooth, suture thread-margined, 

 aperture unarmed, the lip thickened and expanded-reflected. 

 G. ovoideus, Brug. 



Section GONOSPIRA, Swainson, 1840. Subcylindrical, with 

 obtuse or pu pi form apex, parietal wall of aperture unarmed or 

 with a short lamelliform tooth. G. palanga, Fer. 



Subgenus ENNEA, H. and A. Adams, 1855. 



Shell small, pupiforrn, with obtuse apex ; aperture with 

 reflected lip, usually armed with teeth, parietal wall generally 

 dentate or lamellate. 



Section UNIPLICARTA, Pfeiffer, 1855. Shell rather large for 

 the subgenus, shining, obsoletely striate, lip without teeth, 

 parietal wall with a strong lamella near the junction of the 

 upper extremity of the outer lip. E. cerea, Dunker. 



Mostly Africa and Madagascar. 



Section NEVILLTA, Martens, 1880. Shell small, ventricosely 

 pupiform, with numerous narrow whorls ; longitudinally closely, 

 sliavply ribbed, aperture somewhat produced, small, with 

 expanded lip, parietal wall nearly horizontal, bearing a promi- 

 nent lamella. G. clavulata, Lam. Approaches Ennea. 



Section ENNEASTRUM, PfeifFer, 1855. Parietal and outer mar- 

 gins of the aperture both lamellate. E. elegantula, Morelet. 



Africa. 



Section GULELLA, PfeifFer, 1855. Smooth, or obliquely finely 

 ribbed-striate ; parietal margin lamellate, outer lip multidentate. 

 E. capitata, Gould. Africa. 



Section HUTTONELLA, Pfeiffer, 1855. Elongated, narrowly 

 cylindrical, minute, hyaline, polished ; parietal wall plicate, 

 interior of aperture dentate. Africa, India. E. bicolor, Hutton, 

 an Indian species, has been introduced into China, the Mascarene 

 Islands, West Indies, etc. 



Subgenus DIAPHORA, Albers, 1850. 



Cylindrical, umbilicated, apex obtuse, base obsoletely carinate; 

 whorls numerous, narrow, flattened, the last detached ; aperture 

 pyriform, not dentate, the lip expanded. G. Cumingianus, 

 Pfeitfer, 



Resembles Cylindrella. Indo-Ghina, Philippines. 



