Ii4 Records of the Indian Museum. [Vol. X, 



Under the last reference de Man quotes the earlier synon^-niy 

 of this abundant species. To his detailed description I have little 

 to add. I would, however, remark on the presence of a small 

 (pterygostomian) spinule at the antero-lateral angles of the cara- 

 pace (fig. 6) and to the gape at the base of the fingers of the 

 chela of the first peraeopods when the claw is closed (fig. 7); it 

 is only by attention to these seemingly trivial details that spirit 

 specimens of Hippolysinafa vittata can be distinguished from the 

 allied H . kukenthali. 



The rostrum in Indian examples of H. viltaia bears six to 

 nine dorsal teeth; the hindmost is situated just in front of the 

 middle of the carapace and is always separated by a considerable 

 interval from the next of the series. On the inferior margin 

 there are from two to four very small teeth 



The antennal scale, in adults, is a little less than three times as 

 long as broad. 



The second peraeopods are symmetrical and the distal end 

 of the merus, which may be annulated, reaches to about one- third 

 the length of the antennal scale. The carpus is composed of 

 I5~i9 segments. Stimpson in his original description gives 20, 

 and subsequent authors 17 — 24. In the proportions of the last 

 segment and of the chela the specimens agree closely with de 

 Man's account. On the last three legs there are five or six 

 dactylar spines which increase in size as thev approach the apex 



(fig- 8) 



The telson (fig. 9) has convex margins and a comparatively 

 broad apex which is furnished with the two pairs of spines found in 

 most members of the family. 



The colour of living specimens is very striking The whole 

 animal is practically transparent with narrow longitudinal stripes 

 and streaks on the carapace and abdomen. At the anterior end 

 of the first abdominal somite there is a complete transverse band 

 and another is distinct at the anterior end of the fourth somite. 

 The latter stops half way down on either side where it meets 

 the uppermost of the three complete longitudinal stripes of the 

 abdomen. Tliere are other short longitudinal streaks on the cara- 

 pace and abdomen, those on the anterior portion of the former 

 being oblique. There is a median red stripe on the telson and on 

 each inner uropod. The thoracic appendages are clear red and 

 the eggs light green. 



The following specimens are preserved in the Indian IMu- 

 seum : — 



Madras. J. R. Henderson. One, ,:;i mm. 



Kilakarai Ramnad Disi., S. W. Kemp. .Man\-, 14 — 27 mm. 



S. India, o — 2 tins. 



N. Cheval Paar, Ceylon. T. Southwell. One, ji mm. 



c, 1; 7 7 

 10 



•IJJl-i 



3.2i^^__Go ( Karachi. Karachi Museum. I'Orlv, 18^ — ,^0 mm. 



Persian Gulf, 28° 59' N., ' Investigator. ' Three, 24 — ^4 mm. 



5o°3'H-, 25fm.s. 



