OBBA. 109 



(Group of 0. marginata.') 



O. bigonia Fer., vi, 226. O. kobeltiana Pfr., vi, 228. 



samarensis Pfr., olim. O. parmula Brod., vi, 229. 



bizonia H. & A. Ad. discus Dh., vi, 230. 



O. marginata Mull., vi, 227. f. obscura Mlldff., vi, 230. 



grayana Pfr. f. elevata Mlldff., vi, 230. 



grayi Hombr. & Jacq. f. trochoidea Mlldff., vi, 230. 



scabrosa Fer. O. bustoi Hid., vi, 230. 



v. griseola Mlldff., vi, 228. O. saranganica Hid., vi, 230. 



v. sororcula v. Mart., vi, 228. O. kochiana Mlldff, vi, 231. 



devincta Tap. Can. O. bulacanensis Hid., vi, 226. 



(Group of 0. horizontalis.*) 



O. horizontals Pfr., vi, 232. O. lasallii Eyd., vi, 233. 



O. reeveana Pfr., vi, 233. meretrix Sowb. 



O. columbaria Sowb., vi, 234. 



Subgenus? OREOBBA Pilsbry, 1 894. 



Janira ALBERS, Die Heliceen, 1850, p. 124, only species H. codo- 

 nodes. Not Janira Leach, 1813 (Crustacea), of Oken, 1815 (acale- 

 pha) or of Schumacher, 1817 (Pecteri). 



Shell globose-conoidal, bullet- shaped, composed of about 5 whorls 

 which are carinated in immature shells ; the embryonal portion not 

 differentiated ; last whorl defiexed in front. Surface shining, micro- 

 scopically spirally striated. Aperture truncate-rounded ; entire lip 

 well reflexed, at the columella expanded partly over the narrow 

 umbilicus, and armed with a callous tooth on the inner edge. Type 

 H. eodonodes Pfr., pi. 19, fig. 11. 



Animal unknown. 0. eodonodes inhabits the Nicobar Islands. 

 It resembles the Philippine Island group Phcenicobius in contour, but 

 not in texture or minute sculpture, nor in the apical whorls. The 

 sculpture is like that of the Obba horizontalis group. Of the two 

 species I have seen only eodonodes. A knowledge of the anatomy 

 is necessary to the exact location of this group in the system. It 

 cannot, in my opinion, be united to Phcenicobius. 



O. eodonodes Pfr., vi, 236. O. camel us Pfr., vi, 237. 



