1913J S. Kemp : Crustacea Siomatc-pcda of the Indo-Pacific Region. 131 



to the dactylus. This margin as in allied genera is pectinate, but only along its basal 

 two- thirds. In the distal third, where there are no pectinations, the inner and outer 

 edges are elevated and form a pair of low smooth crests, between which the proximal 

 edge of the dactylus fits when the. claw is closed. The dactylus bears four 1 spines 

 including the terminal one. Its outer margin is notched at the base, and in front of 

 this notch is strongly inflated somewhat after the fashion of Gonodactylus. 



The free thoracic and first four abdominal somites are smooth dorsally. The 

 lateral margin of the fifth possesses a vertical groove, which separates a pair of inferiorly 

 convergent carinae, the posterior of which is the highest and in dorsal view resembles 

 a lateral spine. The sixth and seventh somites are broadly rounded laterally and the 

 short inner ramus of the three pairs of thoracic limbs is linear. 



The postero-lateral angles of the first four abdominal somites are not spinous. 

 The posterior half of the fifth somite is rather thickly scattered with small irregular 

 tubercles, and close to the external margin there is a fine longitudinal carina which runs 

 outwards and terminates in the angular and produced postero-lateral angle. The 

 sixth somite is densely covered with stellate or spinous tubercles, and its postero- 

 lateral angles end in spines. The posterior margins of both the last two abdominal 

 somites are fringed with a series of sharp spinules. 



The telson is rather less than twice as broad as long ; it is strongly convex and, 

 like the preceding segment, is covered with closely packed spinous tubercles. Seen 

 from below a pair of submedian movable spines may be distinguished, and two pairs of 

 large fixed lateral spines ; there are also, near the distal margin, two pairs of inferior 

 spines situated inwards of the two pairs of laterals. The ventral surface bears numer- 

 ous scattered spinules. 



Tubercles similar to those on the dorsal aspect of the telson are found on the upper 

 side of all the segments composing the uropods, but on the endopod and ultimate segment 

 of the exopod, they exist only in a narrow median crest. The peduncular segment is 

 strongly arched and sharply carinate antero-laterally ; distally it is produced as a spine, 

 supported by a short carina, which overhangs the articulation of the basal segment 

 of the exopod. The ventral bifurcate process consists of a sharp inwardly curved spine 

 which is very broad proximally. Its outer margin bears a sharp tooth near the apex, 

 while its inner margin is cut into three or four strong teeth. The process is strength- 

 ened by a blunt longitudinal ventral carina. The external margin of the basal segment 

 of the exopod carries nine or ten movable spines, and there is also an additional one, 

 which is fixed, at the extreme distal end of the ventral surface. The internal margin of 

 the inner uropod is concave, the segment being more or less crescentic in outline. 



Two of the specimens examined are pale straw colour in spirit sprinkled with very 

 small black chromatophores. These are aggregated and tend to form a dark posterior 

 band on the carapace, enclosing a small pale area on either side. In addition, there is 

 a median and pair of lateral patches on each of the first five abdominal somites. The 



1 In one of the specimens examined there are on one side only three spines, but this appears to be 

 lite abnormal. 



quite abnormal 



