The Aniphipoda of Bermuda. 105 



and rather short and stout, second joints of posterior pairs scarcely 

 broader than those of anterior pairs ; posterior pereiopods with pos- 

 terior margin fringed with strong ciliated setae. 



Posterior abdominal segments fused, about ^/2 as long as body in 

 male, ^/s in female; dorsal posterior margin of third segment pro- 

 duced to form long projection, slightly curved, directed posteriorly, 

 which is much longer in male than in female. 



Uropods, 3 pairs; first pair biramous with long cylindrical ped- 

 uncle and rather short styliform rami scarcely half as long as ped- 

 uncle, inner ramus somewhat broader than outer and armed apically 

 with 3 short spines ; second pair rather short, biramous, with lamelli- 

 form rami which have 5 or 6 serrations apically and are scarcely 

 half as long as peduncle which is expanded greatly to form a sub- 

 quadrate lobe having serrated outer margin ; third pair with short 

 peduncle and single rather long, oval ramus which is leaflike and 

 serrated on edge. 



Telson small, triangular, subcarinated dorsally, apex acute. 



Length of female 5 mm., of male (exclusive of terminal uropods) 

 6 mm. 



Sexual diffences rather marked; in male, dorsal projection from 

 third abdominal segment relatively much longer than in female ; 

 second pair of uropods with expansion of peduncle broader than long 

 and with serrated margins, whereas in female the expansion is long 

 and provided with many closely set long spines ; third uropod with 

 much longer ramus than in female. 



A large number of specimens were obtained from the neighbor- 

 hood of Coney Island in submerged timbers which were thoroughly 

 honey- combed with the tunnels of the animal. 



The species has been recorded from the North Atlantic and ad- 

 joining seas (Europe from Norway to the Black Sea, North America). 



Tribe Laemodipoda. 



First thoracic segment fused with head ; eyes small, compound ; 

 mandibles with or without palp ; first maxillae without inner plate ; 

 maxillipeds normally developed with 1- to 4-jointed palp. 



Pereiopods, when not rudimentary, ending in prehensile claws. 

 Abdomen short and small with or without appendages. 



The tribe is divided into 2 families, the Caprellidae and the 

 Cyamidae, characterized as follows : 



