208 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



well-developed terminal process, clawlike structure. Distal end of 

 terminal process strongly cm'ved; division between terminal process 

 and second segment distinct, segment with small, spinelike accessory 

 process on inner margin at junction of segment and terminal process. 

 Terminal process of second segment with several small, rounded 

 swellings on inner median surface (fig. 17o). 



Maxilliped of male similar to that of female except with large pro- 

 trusion of middle of inner margin to receive distal end of terminal 

 process of second segment when segment flexed. Ai'ticular process 

 on proximal end of first segment shorter than that of female (fig. lip). 



Sternal furca of female and male situated between, and slightly 

 posterior to, bases of maxillipeds. Greatest width of base of process 

 slightly more than distance across tips of tines; tines directed slightly 

 outward from apex of bifurcation, terminating in blunt tips. Bifur- 

 cation extending almost half length of furcal process (fig. 17 q). 



First thoracic leg biramous though endopodite present only as 

 small, finger-like projection at junction of protopodite and exopodite. 

 Protopodite one-segmented, with small projection of outer proximal 

 end forming articular surface. Distal margin of protopodite irregular, 

 with single, plumose setule on outer corner. Exopodite two-segmented, 

 first segment saddle-shaped, with single spinule and large, rounded 

 articular process on outer distal margin. First segment of exopodite 

 of D. curtus much longer, with spinule on outer distal margin and 

 setules on inner margin as in D. hijurcatus. Second segment of exopo- 

 dite short, less than half length of first, with three spines and one 

 small, plumose seta on distal surface. Innermost and medial terminal 

 spines with row of fine setules on inner margin and slight concave 

 depression of inner distal surface across which fine membrane stretches 

 (fig. 18a). 



Second thoracic leg biramous. Protopodite two-segmented; first 

 segment short, slightly more than half length of second segment, with 

 bilobed proximal end. Exopodite three-segmented; first segment 

 longer than combined lengths of second and third, with small lobate 

 process on proximal surface; process also present on D. curtus but not 

 reported by either Wilson (1913) or Yeatman (1957). First segment 

 with strongly developed terminal spine on outer corner, spine with 

 row of minute setules along inner margin. Second segment with 

 single spine, spine slightly shorter than that of first segment. Third 

 segment with two spines, proximal extending at slight angle to mar- 

 gin of segment (not visible in figure). Endopodite three-segmented, 

 second segment irregular, greatest length approximately equal to that 

 of first and third segments combined (fig. 186). 



Thu'd thoracic leg biramous. Protopodite one-segmented, forming 

 broad, flat, platelike structure. Exopodite three-segmented, with 



