406 



U.S. NATIONAL MUSEUM BULLETIN 2 71 



Ceina bridges the Phliantidae and Prophliantidae in its subchelate 

 gnathopods and cleft telson but is retained in Phliantidae because 

 of its nonbiramous third uropods and presence of a flagellum on 

 antenna 2. 



Figure 145. — Phliantidae: Heterophlias seclusus Shoemaker (1933a): a, dorsal view; 



h, lateral view. 



The Podoceridae have a mandibular palp and molar. The Tali- 

 troidea have well-developed triturating mandibular molars (except 

 for Najna which otherwise has the talitroid facies) . 



The Kuriidae have a well-developed triturating molar and poorly 

 developed outer plates of the maxilliped. The Dexaminidae, less 

 Anatylinae, have well-developed triturating molars. The palp of max- 

 illa 1 is normal in all dexaminids and segments 2-3 of the urosome 

 are coalesced. 



