HBLICOSTYLA. 193 



keeled ; columella intrant, sloping angulately, united to the 



basal margin ; peristome simple, thin, slightly marginate, the 

 margins expanded. 



Albaiensis, Sow. papyracea, Brod. 



Broderipi, Pfeiff. puella, Broil. 



conformis, Fcrus. regina, Brod. 



cryptoportica, Gould. retusa, Pfeiff. 



Dryope, Brod. Tayloriana, Adams and 



excentrica, Pfeiff. Reeve. 



filaris, Yalenc. Tongana, Quoy. 



Leytensis, Pfeiff. Valenciennesii, Eyd. 



Nais, Pfeiff. virgo, Brod. 

 nasuta, Metcalfe. 



Sub-gen. axina, Albers. 



Shell imperforate, covered with a deciduous, hydrophanous 

 epidermis, depressed or sub-trochiform ; whorls flat ; columella 

 short, callous, oblique ; peristome marginate, expanded above, 

 reflexed at the base. 



carbonaria, Soir. inversicolor, Ferus. 



Cumingi, Pfeiff. Siquijorensis, Brod. 



Guillarmodii, Shuttl. Zebuensis, Brod. 



Sub-gen. chlor.ea, Albers. 



Shell shining, imperforate, flattened, globosely depressed or 

 lenticular ; whorls flattened, the last angulated or carinated, de- 

 scending at the aperture ; peristome acute, more or less ex- 

 panded, the margins contiguous, the basal reflexed, adpressed. 



amcena, Pfeiff. fibula, Brod. 



constricta, Pfeiff'. Gmeliniana, Pfeiff. 



curvilabrum. Adams and Hanleyi, Pfeiff. 



Peeve. Hiigeli, Pfeiff. 



