12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



ments with long prominent aesthete. Formula for armature: 5, 14, 

 9, 4 + 1 aesthete, 2 + 1 aesthete, and 7 + 1 aesthete. Only ornamenta- 

 tion on first antenna consisting of crescentic row of spinules on first 

 segment. 



Second antenna (fig. 46) 4-segmented, last segment 32 ju x 19ju in 

 greatest dimensions. Each of first 2 segments with a seta, third 

 segment with a spine and 2 slender setae on its inner distal expansion, 

 and last segment bearing 7 elements (a spine and 6 setae). Orna- 

 mentation indicated in figure, inner margins of third and fourth 

 segments having rows of scalelike spinules. 



Labrum (figs. 47, 48) ornamented with spinides as indicated in 

 figures. 



Mandible (fig. 49) bearing 3 terminal elements: a clawlike ventral 

 (outer) spine with 1-2 spinous processes on its concave edge, a spine 

 with lateral spinous projections on its basal half, and a slender barbed 

 seta. No paragnath. First maxilla (fig. 50) bilobed, with 8 setae 

 disposed in groups of 3, 4, and 1. Second maxilla (fig. 51) 2-seg- 

 mented; first segment unarmed, second with outer haired seta and 2 

 inner barbed spinidose setae and terminating in a short clawlike 

 process with at either side a setiform barbed process (these 2 processes 

 perhaps setae but their articulation not evident). Maxilliped (fig. 52) 

 4-segmented, first segment with inner barbed seta, second with 2 

 naked setae, third unarmed, and fourth (fig. 53) subterminally with 

 small naked seta and terminally with minute spiniform process and 

 fringe of spiniform ornamentations resembling a small fan. 



Area behind mouth and between mouthparts (fig. 47) showing 

 anteriorly a transversely elongated median lobe (lingua) with a few 

 very minute lateral spinules, followed immediately by a transverse row 

 of hairs in 2 groups. Posterior to this a row of prominent spinules, 

 with at either end a cluster of hairs. Bases of maxillipeds joined by 

 sclerotized lines. Postoral area between maxUlipeds and leg 1 

 broadly protuberant, especially noticeable in lateral view. 



Legs 1-4 (figs. 54-57) with 3-segmented rami. Armature of legs 

 as follows (Roman numerals = spines, Arabic numerals = setae): 



P 1 protopod 0:1 1:1 



P2 protopod 0:1 1:0 



P3 protopod 0:1 1:0 



P4 protopod 0:1 1:0 



Free edges of all 4 intercoxal plates ^\ith rows of long slender 

 setules. Inner margin of basis of leg 1 (fig. 54) bearing spinulose 



