222 Records of the Indian Museum. [Voi,. XXIV, 



13 times as long as broad, 1*5 times as long as the merus and a 

 little longer than the chela. The palm in this specimen is 1*3 

 times the length of the lingers. In the smallest male in the collec- 

 tion the carpus is as much as 1*4 times as long as the chela. 



The series of specimens in the collection comprises a number 

 of individuals which, in the proportions of the segments of the 

 second peraeopods, are intermediate between those described above, 

 indicating quite clearly that the differences are due to progressive 

 growth. The second legs of very large males appear to develop in 

 a phenomenal manner, as in the Hippolytid genus Saron and in 

 Palaemon. 



In ovigerous females the second peraeopods are from 4*5 to 

 57 times as long as the carapace. The carpus is from 1*5 to r8 

 times as long as the merus and from 1*2 to 1*4 times as long as the 

 chela. The palm is about 1*3 times the length of the fingers. 



In the second peraeopods of some large males each finger is 

 conspicuously excavate in its proximal half. In other males no 

 trace of this excavation is visible ; the fingers meet throughout 

 their length when the claw is closed and are armed only with a 

 series of very small teeth, most conspicuous at the proximal end. 

 Specimens in intermediate stages, with the gape in the fingers 

 poorly developed, are not uncommon. As a rule the fingers in 

 both legs of a pair are similarly formed, but I have seen a specimen 

 in which one chela only possessed gaping fingers, as in the type 

 of Borradaile's P. kolumadulensis. In large females the fingers 

 sometimes exhibit a small excavation, similar to that seen in some 

 large males but less well developed. 



The last three legs are extremely long and slender, the fifth 

 reaching to or a little beyond the rostrum. The merus of the third 

 pair is from 20 to 26 times as long as wide. The propodus is from 

 4'5 to 5'5 times the length of the dactylus ; it bears some short 

 spinules on its posterior edge and shows traces of subdivision into 

 5 to 7 subsegments. The dactylus is simple, curved, and with a 

 few setae in the middle of its anterior margin ; it is from 6*5 to 

 7*5 times as long as its basal breadth. 



The sixth abdominal somite is about one-third longer than 

 the fifth. The foremost pair of dorsal spinules on the telson are 

 situated in the anterior half of the telson, the second pair rather 

 further from the foremost than from the apex. The intermediate 

 apical spines are very long. 



The largest specimen, a male, is about 22 mm. in length. 



The species is characteristically coloured when alive. The 

 carapace and abdomen are semitransparent, with a few narrow 

 oblique streaks of white and red on the former and mid-dorsal and 

 lateral red stripes on the latter. On the rostrum, at the junction 

 of the middle and distal thirds, there is a band of dark red pig- 

 ment ; in front of this the rostrum is entirely sulphur yellow, 

 while behind it on the inferior half there is a streak of the same 

 colour. The tip of the telson and the basal portions of the uro- 

 podial setae are bright red. The eyestalk has two white longitu- 



