416 PROCEEDINGS OF THE NATIONAL MUSEUM vol 89 



First plcopod of first form male bearing all five processes; mesial 

 process slender and extending distad of the other processes; caudal 

 process is recurved distad and terminates in a point. 



Male holotype (form I). — Body somewhat compressed laterally; 

 abdomen only sliglitly narrower than cephalothorax. 



Width of carapace in regio]i of caiidodorsal margin of cervical 

 groove almost equal to deptli; greatest width immediately posterior 

 to caudodorsal margin of cervical groove. 



Areola moderately broad and short, with three irregular rows 

 of punctations, about 4.2 times as long as broad, not depressed. 

 Cephalic region of carapace about 2.1 times as long as areola. 



Rostrum without lateral spines; margins slightly raised, its apex 

 reacliing the base of tlie third segment of peduncle of antennuie; 

 upper surface concave, punctate. Postorbital ridges terminate an- 

 teriorl}'' without spines and extend posteriori}^ more than halfway 

 between tip of rostrum and caudodorsal margin of cervical groove. 



Surface of carapace punctate above, granulate lateraDy. No lateral 

 spines present. Cephalolateral margins each with one spine near 

 anterior extremity of cervical groove. 



Abdomen almost as broad as carapace, longer than cephalothorax. 

 Anterior section of telson with two strong spines in left and one in 

 right posterolateral corners. 



Epistome with margins slightly elevated; shalloAvly scalloped (ter- 

 minating medioanteriorly in a small blunt spine in some specimens, 

 not, liowever, in the holotype). 



Antennules of usual form; a spine on ventral side of basal segment. 



Antennae extending posteriorly to l^ase of fourth abdominal segment. 



Antenna! scale of moderate size, broadest just anterior to middle. 

 Spine on outer margin strong, extending to tip of rostrum. 



Right first pereiopod heavy. Palm setose-tuberculate; tubercles 

 along mesiodorsal rt^gion large and bent distally. Distinct dorso- 

 median ridge on both finger. Lateral ridge on each finger less well 

 developed. Twelve to 13 tubercles along inner margin of palm. 



Movable finger: Inner margm with 9 or 10 rounded tubercles, the 

 4 proximal ones largest and of these the fourth, is the largest; minute 

 denticles along the distal tliird. Ventromesial and ventrolateral 

 margins setose-punctate. Mesial margin with 10 or 11 tubercles. 

 Dorsomesial, proximal one-third and dorsolateral, proximal one-third 

 with tubercles; distal two-thirds setose-pinictatc. 



Immovable finger with five or six rounded tubercles on mesial 

 mai-gin, the third the largest. Ventromesial surface with one large 

 strikingly corneous tubercle at base of distal tliird. Distal third with 

 minute denticles. Finger setose-punctate otherwise. 



Carpus longer than broad; about equal in length to iimer margin 

 of pahn of chela, and a shallow longitudinal groove above. Setose- 



