181 



The lower orbital border is composed of two compressed 

 tubercles, with a deep notch between the outer one and the 

 external angle. The suborbital region is marked by 6-9 

 small, scattered papilliform tubercles. Two oblique, compress- 

 ed, and prominent tubercles form the 'external angle of the 

 buccal frame, while the front border of the buccal frame is 

 horizontal and cut by two deep narrow notches and a small 

 median one. 



The first peduncular joint of the antennae is large 

 and nodular, with two distal projections, the outer one throw- 

 ing out a branch behind over the base of the ocular peduncle; 

 the next two joints are of moderate width and the flagellum 

 is small. 



The epistome is sunken, very narrow in the longitudinal 

 direction, with a triangular process above, the apex of which 

 projects a little and meets a process of the front. 



The chelipeds are moderately robust — rather more so in 

 the male — the carpus and propodus are scarcely compressed 

 and are very irregularly nodular : the merus is trigonous, its 

 upper edge bears some small, irregular tubercles, with a large 

 nodular tubercle near the distal end ; the carpus and palm 

 are subequal in length. The fingers are broadly excavate, 

 their outer margins provided with strong interlocking teeth. 

 The mobile finger has a deep groove filled with hair on the 

 outer side, the immobile one is grooved on both sides, mak- 

 ing the lower border carinate. 



The first and second pairs of legs are nearly equal in 

 size, they are robust and nodular, the meri having strong dis- 

 tal tubercles on the upper margins. The meri, carpi, and 

 propodi are subequal in length, the dactyli are strongly spin- 

 ed. The third and fourth pairs are a little roughened, but 

 not nodular, the third is considerably shorter than the fourth, 

 with very short propodi bearing each four or five distal, 

 slightly-curved spines, two of which are opposed to each dac- 

 tylus ; the dactyli are strong and much curved. The fourth 

 pair is similarly spined. 



The pleon of the male has the first segment laterally pro- 

 duced to a point on each side, the second has the shape of 

 a truncated triangle, the third, fourth, fifth, and sixth have 

 the median ridge with transverse depressions, thus presenting 

 in each case an anterior and posterior tubercle, the distal 

 angles of each of these segments are strongly emphasized, 

 the terminal see^ment is triangular. The pleon is covered with 

 scattered papilliform tubercles. 



The sternal sulci of the female reach, and are deeply cut 

 into, a transverse prominence or tubercle, which is situated 

 quite between the coxae of the chelipeds. 



