398 PROCEEDINGS OF THE ACADEMY OF [1892. 



The following sections belong here : Caracolus s. s., Lucerna, 

 Dentellaria, Isomeria, Labyi'inthus, * * Eurycratera, Parthena, 

 Polydontes, Tfielidomus, Liochila, and probably Cepolis. 



Genus CAMAENA (Alb.) Pils. & v. Moell. 

 Pilsbry, Manual of Conch. (2) VI, p. 197. MoellendorflF, Nachrichtsbl. d. D. M. 

 Ges. 1891, p. 195. Pilsbry, /. c. 1892, p. 71. 



Genitalia : 9 system having no accessory appendages ; the vag- 

 ina is bound to the wall of the body-cavity by a thin muscle band ; 

 duct of the spermatheca very long. $ system provided with a very 

 muscular penis containing a penis-papilla, and continued above in 

 an epiphallus and flagellum ; retractor attached to the epiphallus. 



Jaw ribbed. 



Distribution, South-east Asia, Philippines, etc. 



The specimen dissected by me was sent without the shell by Dr. 

 V. MoellendorfF. 



As sections or subgenera of Cctmmna the following may be placed : 

 CamcBna s. s., Pseudobba, Phcenlcobius and CamcBnella. 



Subgenus CAM.ffi;NELLA Pilsbry. 



Genitalia as in Camcena, but penis-papilla very large. Jaw 

 ribbed. Marginal teeth of the radula wide, low, and multicuspid. 

 Shell (see Manual of Conch. (2) VI, p. 239). 



Type Helix 2)latyodon Pfr. 



See figure accompanying this paper. The specimens dissected 

 were sent me by Dr. v. Moellendorft'. 



Genus OBBA Beck. 

 = Obbina Semper. 



Genitalia: 9 system without accessory organs ; $ system having 

 a flagellum and a feather-like glandular a2:)pendix. 

 Jaw smooth ; teeth not peculiar. 

 Distribution, Philippines and some adjacent islands. 



Genus CHLORITIS Beck. 



Genitalia : 9 system without accessory appendages ; d system 

 having a long epiphallus inserted with the retractor muscle at the 

 apex of the penis, and continued beyond the insertion of the vas- 

 deferens as a flagellum. 



