1916.J S. Kemp : Notes on Crustacea Decapoda. 405 



The first peraeopods are as described by Borradaile ; the chela 

 resembles that of H. vittata, the fingers being shorter than the 

 palm and meeting only at the tips when the claw is closed. The 

 second legs are very slender, reaching beyond the antennal scale 

 by nearly two-thirds the length of the carpus ; the merus is in- 

 distinctly divided into 13 or more segments, while the carpus is 

 composed of from 21 to 24 segments. The last carpal segment is 

 the longest, about equal in length with the palm and one and a 

 half times as long as the fingers. 



Of the remaining pairs of the peraeopods the third is the long- 

 est reaching beyond the antennal scale by almost the entire length 

 of the propodus. In each pair the merus bears conspicuous teeth 

 externally near the lower border: 5 in the third pair, 5 or 6 in the 

 fourth and 3 or 4 in the fifth. The posterior edge of the propodus 

 is set with fine setae and some seven or eight very slender spinules 

 The toothing of the dactylus is characteristic. As in H. vittata it 

 bears 3 or 4 teeth on its posterior margin which increase in size 

 distally ; the actual apex of the dactylus does not, however, take 

 the form of a tooth, comparable to the others, but is extremely 

 slender and, at the base, less than half the breadth of the adjacent 

 tooth of the marginal series. 



The abdomen, telson and uropods do not appear to dift'er in 

 any marked degree from those of H. vittata. 



The three specimens obtained are all ovigerous females; the 

 largest is about 21 mm. in length. 



The colouration of living specimens is striking, the entire 

 carapace and abdomen being marked with longitudinal stripes 

 composed of small bright red chromatophores. On the carapace 

 at the base of the rostrum the first three pairs of lateral stripes 

 meet in the middle line. The three succeeding pairs are strictly 

 longitudinal, but beneath them the striping on the carapace is 

 oblique. In the middle of the abdomen there are about twenty 

 longitudinal stripes. The eyestalks are heavily blotched with red ; 

 the antennules and antennae are transparent with a faint yellow- 

 ish tinge; the third maxillipedes and all the legs, except the second 

 pair, are conspicuously banded with red. The tail-fan is dotted 

 with red and the eggs are sage green. In colour, therefore, the 

 species bears a striking resemblance to Hippolysmata vittata and 

 H. dentata, but lacks the transverse bands on the abdomen that 

 are found in the former of these species. 



- "^^q"'' Port Blair, Andamans, 8 fms. S. Kemp. Lliree. 



The three specimens were all obtained in a single haul of the 

 net on rough ground in the southern entrance to the channel ofi' 

 Ross I. 



