The Amphipoda of Bcrnnida. 



77 



First gnathopods of female larger than second ; epimeron moderate, 

 third and fourth joints small ; wrist rather large, nearly oval in form, 

 about twice as long as broad, posterior margin more convex than 

 anterior and provided with slender setae ; hand subrectangular, more 

 than twice as long as broad and somewhat longer than wrist, 

 broader at distal end than at proximal, jialm slightly oblique, irreg- 

 ular in shape, with stout spine tooth sejiarating it from posterior 

 margin ; linger moderate in size, of usual form with concave margin 

 serrated. Second gnathopods with small rounded epimera as long as 

 high ; second joint long and slender, of uniform thickness ; third and 



Fig. 29. Microdentopus aiiomalus (H. Ratlike). 



fourth joints small ; wrist triangular, twice as long as l)road, provided 

 with numerous long setae on posterior margin ; hand subrectangular, 

 shorter than wrist, palm nearly transverse, posterior margin and palm 

 provided with abundant setae ; finger similar to that'of first gnathopod. 

 Marsupial plates oval, about two and a half times as long as broad. 



Pereiopods of middle group short, with epimera of moderate size, 

 longer than high ; posterior pereiopods very long and slender with 

 second joints moderately expanded. 



Uropods, 3 pairs, biramous, first pair extending slightly beyond 

 other two ; rami styliform with stout spines at apex and along inner 

 margin, inner rami of first and second longer than outer, inner rami 

 of third uropods slightly shorter. 



