10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



Rostral plate longer than broad, triangular, apex rounded but acute, 

 median carina absent. 



Carapace narrowed anteriorly, completely lacking median and in- 

 termediate carinae; reflected marginal carinae present on posterior 

 fourth of carapace; posterior margin straight; anterolateral margins 

 sloping laterally to short anterolateral spines. 



Raptorial claw slender; dactylus with 4 teeth, outer margin straight, 

 with 2 proximal lobes, distal larger, separated by a shallow emargina- 

 tion; dorsal ridge of carpus terminating in rounded lobe. 



Mandibular palp absent; 4 epipods present. 



Exposed thoracic somites lacking submedian carinae; last 3 thoracic 

 somites w T ith low, unarmed intermediate carinae; lateral process of 

 fifth somite a short, slender spine, directed anterolaterally; a pah* of 

 long, slender ventral spines also present on fifth somite; lateral 

 processes of next 2 somites sub triangular, not bilobed, rounded or 

 angled, but unarmed posterolaterally; ventral keel of eighth somite a 

 low, obtuse tubercle. 



Abdomen broad, depressed, lacking submedian carinae on first 5 

 somites; only carinae of sixth somite armed with posterior spines; 

 area between submedian and intermediate carinae on sixth somite 

 irregular; sixth somite with ventrolateral spine on each side in front 

 of articulation of uropod. 



Telson broader than long, with 3 pairs of sharp marginal teeth, 

 subrnedians with movable apices; prelateral lobes absent; marginal 

 carinae and carinae of intermediate and lateral teeth smooth, carinae 

 of submedian teeth denticulate dorsally; entire dorsal surface of telson 

 covered with carinae of varying length; dorsal submedian carinae 

 interrupted posteriorly, posterior portions fusing with posterior end of 

 median carina ; dorsal surf ace with 1 short carina present inside carina 

 of submedian tooth and 4 long curved carinae, terminating in tubercles, 

 present between submedian and intermediate teeth; anterior surface 

 of telson with several other carinae of varying length, as shown in 

 figure 2 ; median carina with distal spine overhanging smaller median 

 spinule; denticles 5-6, 7, 1, most sharp, outer intermediate and lateral 

 denticles rounded ; ventral surface with postanal keel flanked laterally 

 by 1 short and 1 long carina and about 14 shorter, longitudinal carinae. 



Outer margin of proximal segment of uropodal exopod with 5 

 movable spines, proximal 3 sharp, distal 2 spatidate, last extending 

 about to midlength of distal segment; proximal segment of exopod 

 with dorsal carina; endopod slender, curved; ventral surface of 

 protopod with carina extending anteriorly from articulation of 

 endopod; inner margin of basal prolongation with 5 slender spines; 

 inner spine of basal prolongation longer; 2 rounded lobes present 



