of Indian Dr edging. 473 



cardiac regions greatly elevated. It is finely granular and 

 has numerous spines arranged as follows : — In the gastric 

 region one very long spine on either side, with a very short 

 one in the median line between them, a fourth gastric spine 

 intermediate in size being situate in the median line posterior 

 to the other three. In the cardiac region are two strong 

 spines on well-marked tubercles close to and on either side of 

 the median line. There is a well-marked hepatic spine. In 

 the branchial region there is a very long and strong spine 

 directed forwards, and laterally there are numerous small 

 spines, mostly arranged in two horizontal lines running 

 through the branchial and pterygostomial regions. There is a 

 prominent postocular, but no preocular nor supraocular spines. 

 A very small intestinal spine. The rostrum appears, when 

 looked at from in front or from above, to be trifid, owing to 

 the presence of a strong interantennulary spine, which is as 

 long as either of the proper rostral spines. The latter are 

 two in number, triangular, and run forward horizontally and 

 almost parallel to one another. They are bent downwards at 

 the tips. The abdomen consists of seven distinct segments ; 

 the first six carinate and spinous, the spine on the sixth 

 segment being the longest, the seventh segment granular and 

 rounded at its distal extremity. The sternum is spiny, both 

 anteriorly, where the spines are situated more or less trans- 

 versely, and laterally, where they are placed in two rows, one 

 at the bases of the chelipeds and ambulatory legs, and the 

 other row midway between them and the margin of the abdo- 

 men. The eyes are short, robust, with a small spinule at 

 their distal extremities. The basal joint of the antennas has 

 two spinules on its outer border, one of which — that nearer 

 the base — points downward, the other pointing forward. 

 Arising between these two, but from the inferior surface of 

 the basal joint, there is a third spinule, pointing downwards. 

 The second and third joints are flattened from above down, 

 have each two small spinules on their outer margins, and the 

 third joint reaches to the tip of the rostral spines. The 

 rlagelium is long, slender, and setose. The third maxillipeds 

 have the ischium and merus strongly spinous, and the antero- 

 external angle of the latter is produced to a spiny tubercle. 

 The exognath is as long as the ischium and merus together, 

 and is somewhat narrowed anteriorly. The chelipeds are long 

 and slender, over two and a half times as long as the carapace 

 (77 : 28), the merus slightly shorter than the palm and fingers 

 combined (32 : 35), fingers irregularly toothed and not fitting 

 closely. The first pair of ambulatoiy legs are between twice 

 and one and a half times as long as the chelipeds [122 : 77], 



