176 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



male 



Total length 1. 85 



Length of prosome 0. 7G 



Width of prosome 0. 53 



Length of urosome 0. 91 



Width of urosome 0. 53 



Width at constriction between prosome and ursome 0. 24 



Length of caudal rami 0. 12 



Description of female. — Body (fig. 66a) consisting of 2 parts, 

 anteriormost (cephalothorax) elongate, vermiform, posteriormost 

 (trunk) flattened dorsoventrally, swollen laterally. Cephalothorax, 

 except for maxilla-bearing segment, with heavily sclerotized tergum; 

 maxillae arising from posterior end of cephalothorax, well posterior 

 to maxillipeds. Swollen trunk slightly narrower anteriorly than 

 posteriorly, lateral margins irregular. Dorsal surface of trunk flatly 

 convex, with slight irregularities, distinctly separable from vermi- 

 form cephalothorax, without distinct evidence of segmentation. 

 Ventral surface of trunk (fig. 666) with 3 pairs of bosses, with dis- 

 tinct though incomplete line of division posterior to each pair, giving 

 4-segmented appearance. Lateral posterior surfaces projecting past 

 slightly biconvex median portion as lobate extensions; median pos- 

 terior surface bearing 4 elongate, lanceolate projections, 2 dorsally, 2 

 ventrally, each member of dorsal pair with knob-shaped proximal swell- 

 ing. Trunk with small, knoblike projection between and ventral to 

 base of processes. Egg strings projecting from posterior surface, 

 between dorsal and ventral posterior processes. 



Antennule (fig. 66c) 3-segmented, club shaped, arising from anterior 

 ventral surface of cephalothorax, just lateral and anterior to mouth 

 cone. First segment swollen, flabby, slightly less than twice the 

 combined lengths of remaining 2 segments. Second segment cylin- 

 drical; third segment approximately IK times the length of second, 

 rounded distally, with single, minute spinule from medial anterior 

 surface and 2 hairlike processes distally. Antennae (fig. 66e) bira- 

 mous, situated posterior and lateral to antennule base, extending 

 anteriorly around anterior end of cephalothorax. Division between 

 antenna base and cephalothorax indistinct, incomplete. Protopodite 

 and exopodite separable only by breaks in sclerotization, forming 

 dactyliform projection. Endopodite rudimentary, knoblike, with 3 

 spinules distally. 



Mandible (fig. 66/) rodlike, wavy, flattened distally, distal inner 

 surface with 6 denticidations (including distal end). Maxillule (fig. 

 QQg) situated adjacent to lateral posterior surface of mouth cone, 

 consisting of stalk (with indistinct evidence of segmentation) bearing 

 node from medial posterior surface, node tipped by spinule; stalk 

 flattened distally, distal surface with 3 nodes, each tipped by spinule. 



