374 



U.S. NATIONAL MUSEUM BULLEITIN 271 



telson entire or emarginate; pereopods strongly setose (fossorial), 

 pereopod 5 immensely longer than pereopod 4. 



Relationship. — In gross morphology, this family is scarcely dis- 

 tinct from the Calliopiidae and Pleustidae in which the telson is 



Figure 135.— Oedicerotidae: a, Oediceros saginatus Kr0yer (Sars, 1895, pi. 102); b, Synchel- 

 idium halpocheles (Grube) (Sars, 1895, pi. 112); c, Monoculodes carinatus (Bate) (Sars, 

 1895, pi. 105). 



