I/- 



NEW YORK STATR MUSEUM 



2 FLABELLTFERA 



Uropoda lateral, forming with the last segment, a tail fin. 

 Pleopoda generally of the character of swimming organs, though 

 serving partly for respiration. 



A group of Isopoda exhibiting very diverse characters. It is 

 divided into it families, of which 3 have common representatives. 



Family anxhuriidae 



Body cylindric, narrow and elongated. Uropoda lateral and 

 superior, outer branch arching over base of telson. 



Cyathura carinata (Kr.) 



A n t h n r a carinata KrQyer. Nat. Tidsskr. (2). 2:402. 



? A n t h u r a gracilis DeKay. /. c. 1844. P-44, pl-9> fig'-34- 



A n t h 11 r a b r 11 n n e a Verrill. /. c. 1874. P-572. 



Anthura polita Harger. /. c. 1880. p. 398, pi. 11, fig.68-69. 



Cyathura c a r i n a t a Richardson. /. c. 1901. p. 508. 



Segments of the pleon ftised so as to re- 

 semble an eighth thoracic segment. Ter- 

 minal uropoda bent so as to resemble a cup 

 or " flower ". Antennulae and antennae 

 similar, short and stout, with very small 

 flagellum. A bottom form living in sand 

 and mud. 



Length 15-18 mm, breadth T.8-2 mm. 

 Color brownish, mottled with yellow. 



Taken at Bergen Beach on sand flats. 



A somewhat similar species, Anthura 

 tenuis (Harger) may possibly be found 

 in the same localities. It is smaller than 

 the above, measuring 11 mm, and the 

 antennulae of the male are very hairy, 

 resembling bottle brushes. 



Family cyajothoidae: 

 Parasitic, usually on fish. Head projecting over base of anten- 

 nulae, which, like the antennae are short and tapering with but 

 little distinction into peduncle and flagellum. Dactylus of feet 

 curved and adapted for fastening to the body of the fish. 



Fig-. 42 Cyathura car 

 inata (After Harger) 



