The Amphipoda of Bermuda. 53 



Lower lip with outer plates rather widely separated, mandibular 

 processes moderately long ; inner plates moderate. First maxillae 

 with inner plate triangular with 2 plumose spines apically ; outer 

 plate large, provided with pectinate and branched toothlike spines, 

 terminal margin straight and oblique ; palp 2-jointed, terminal joint 

 twice as long as first and moderately stout, apex rounded and 

 provided with number of finely serrated spines. Second maxillae 

 with inner plate nearly as long as outer and with margins parallel 

 and apex rounded ; outer plate broader than inner, slightly broader 

 distally and with inner margin longer than outer. Maxillipeds with 

 inner plates narrow, twice as long as wide, apex straight and in- 

 clined slightly toward middle and provided with 14 or 15 plumose 

 spines ; outer plate much larger than inner with median margin 

 provided with numerous toothlike spines and setae and distal margin 

 with about 6 plumose spines ; palp 4-jointed with last joint claw- 

 like ; second joint twice as long as first and broader at distal end 

 than at ])roximal, rather broad, provided with setae on distal half; 

 third joint a little longer than first with apex provided with ciliated 

 knob and abundant long setae on distal half. 



In male, first gnathopods smaller than second ; second joint rather 

 slender with margins parallel and provided with few short setae ; 

 third joint about as long as wide provided with a fascicle of setae 

 on distal margin ; fourth joint rather more slender than third, with 

 anterior and posterior margins parallel, posterior margin prolonged 

 to form triangular process which is twice as long as broad ; wrist 

 triangular, cup-shaped, rather broader than hand, posterior margin 

 thickly beset with setae ; hand oval, with palm slightly convex, 

 finely serrated toward apex, provided with numerous setae ; dactyl 

 about ^/2 as long as hand, of usual form with fine cilia on concave 

 margin and a single seta near base of outer margin. 



Second gnathopods with moderately developed second joint, pro- 

 vided with short setae on posterior margin and longer ones on 

 straight anterior margin ; third joint slightly longer than wide with 

 small convex process at anterior end and furnished wdth fascicle of 

 setae apically ; fourth joint with posterior margin twice as long as 

 arterior and provided with fascicle of setae distally ; wrist very 

 short and broad, about as broad as long and about as broad as 

 hand, posterior margin very convex and provided with very many 

 setae of moderate length, articulating with short anterior margin of 

 fourth joint ; hand slightly more than twice as long as broad, oval ; 

 palm rather oblique, bearing rather broad, flat process near articu- 

 lation with finger and having several teeth, anterior and posterior 



