350 



PROCBE DENGS OF THE NATIONAL MUSEUM 



Genital segment probably consisting of two segments, at least in the 

 male, as indicated by male fifth and sixth legs. Segment well de- 

 veloped, with or without lobate projections of posterior lateral sm-faces. 

 Fifth leg of female and male a distinct, dactyliform or acuminate 

 projection without serrations, sixth leg of male usually a small, knob- 

 like projection although sometimes, as in D. curtus, similar to but 

 smaller than male fifth leg. 



Abdomen 1-segmented. Caudal rami flattened, not filiform, 

 possessing six setalike projections that are all usually plumose. 



Antennules 2-segmented, first segment larger than second, with 

 plumose setae on anterior ventral and distal ventral surface of first 

 segment and naked setae on distal end of second except for one naked 

 seta on distal posterior surface. Antennae 3-segmented, prehensile, 

 female with simple, clawlike terminal process, male with complex 

 terminal process often consisting of several parts. Mandibles rodlike, 

 4-parted, fourth part short, curving inwards, with inner margin dentic- 

 ulated. Postantennal process present, spikelike, with three nodules, 

 each bearing several hairlike processes. Postoral process present, 

 either bifurcate or simple, frequently with either knob or weakly 

 sclerotized acuminate process on inner surface. Maxillae 2-segmented , 

 second segment tipped by two saber-shaped processes. 



Maxillipeds 2-segmented, prehensile, with well sclerotized, clawlike 

 terminal process. Maxillipeds of male frequently with small but 



1 The sum of the plumose setae on the segment is six. 



* May be p. 



' Members with a 3-segmented exopodite. 



« Members with a 2-segmented exopodite. 



(c): c may be absent. 



