232 



Records of the Indian Museum. [Vol,. XXIV, 



Harpilius depressus was described by Stimpson from the 

 Hawaiian Is. and I am not altogether certain that the form which 

 occurs on the Indian coast is correctly referred to the same species. 

 The specimens examined differ from the original description in two 

 particulars : there is no difference between the sexes in the form of 

 the third maxilliped and the fingers of the second peraeopod are 

 always more than half the length of the palm. Stimpson 's descrip- 

 tion is very brief and his account of the spines on the segments of 

 the second leg is inadequate. Further information on the form 

 occurring in the Hawaiian Is. is necessary before the name of the 

 Indian form can be regarded as beyond doubt. 



The principal characters of the specimens to which I apply 

 the name are the following : — 



(i) The rostrum is deeper than in H. beaupresi and bears 5 

 to 7 teeth above (usually 6 or 7) and 2 to 5 below (usually 3 or 4). 

 The posterior dorsal tooth is placed at the base of the rostrum in 



Text-fig. 69. —Harpilius depressus Stimpson. 

 Anterior part of carapace, rostrum, etc. 



advance of the hinder limit of the orbit. The midrib of the rostrum 

 is continuous with the orbital margin (text-fig. 69). 



(ii) The antennal spine is placed close to the lower orbital 

 angle and is not supported by a carina. The hepatic spine is 

 placed on a much lower level than the antennal and the postero- 

 lateral angle of the carapace is rounded. 



(iii) The spine on the outer side of the second segment of the 

 antenna is very long. The terminal spine of the antennal scale 

 does not reach as far forwards as the distal end of the lamella. 



(iv) The antepenultimate segment of the third maxilliped is 

 broad, about 6 times as long as wide. 



(v) The first peraeopod is rather stouter than in H. beaupresi. 

 The carpus is less than 6 times as long as its distal breadth and the 

 fingers are less than half as long as the palm. 



(vi) In the second peraeopod (text-fig. 70) the ischium bears 

 a single spine, which is large and placed at the distal end of the 

 lower border. The merus is closely similar to that of H. beau- 

 presi. The carpus has one spine only placed on the lower side. 



