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



beyond, the distal end of the uropods. It differs widely in shape 

 from that found in the preceding species and there is no trace of 

 the usual terminal spines. 



This very variable and, as it appears, abundant species of 

 Hippolysmata seems to be rather an outstanding form, differing 

 markedly from any species of the genus with which 1 am acquain- 

 ted in the peculiar characters of the rostrum and telson and in 

 the rudimentary condition of the epipods. 



The following specimens are in the Indian Museum : — 



R>io-i Madras. ... Two, 51 and 54 min. 



"10- Pondicherry. J. Wood-Mason. One, 64 mm. 



^\o^ Colombo. |. Anderson. Six, 50-79 mm. 



TYPES. 

 -\ji- Akyab, Lower Burma. F. Stoliczka. Four, 52-60 mm. 



^f^^ Bombay. H. P. Mcsurier. Two, 35 and 63 mm. 



var. punctata, nov. 

 Plate VII, figs. 5—7. 



The rostrum in this form is nearly always more upturned 

 distally than in typical ensirostris (figs, 5,6). It bears from 8 to 

 13 dorsal teeth of which the posterior 4 to 8 form a basal crest. 

 On the carapace a groove above the oral region,barely distinguishable 

 in the typical form, is comparatively well-marked and a depression 

 between the branchial and cardiac regions is alwa3"S definite (fig. 5). 

 The cardiac regions are somewhat swollen on each side of the 

 middle line, so that the posterior third of the carapace is nearly 

 flat dorsally. The branchiostegal walls are covered with a rather 

 coarse pitting, the pits being very close and often confluent (fig. 7). 



The antennal scale is hardl}^ ever more than three times as 

 long as wide. The third maxillipedes reach as far as, or a little 

 beyond, the apex of the antennal scale. The carpus of the 

 second pair of peraeopods is composed of 15 to 22 segments and 

 the fifth pair reaches beyond the antennal scale by at least the 

 whole of the propodus and sometimes by as much as one-half of 

 the propodus as well. The dactylus of this pair is longer than 

 in most typical examples of the species, the propodus being only 

 three and a half times its length. 



After careful examination I have come to the conclusion that 

 this form is nothing more than a variety of H. ensir stris, for the 

 points of difference are entirely matters of degree. The variety 

 punctata appears to be an extreme form of ensirostris in which the 

 areolation and pitting of the carapace is more definite, the legs 

 longer and more slender and the basal crest of the rostrum 

 composed of a smaller number of teeth, 



--fx)~-® Green I., Amherst, ' Investi.gator.' Fifty-two, 35-60 mm. 



Tenasserim, 

 -yj- Thongwa, Burma. I. H. Burkill. Three, 51-63 mm. 



3is7.r+7 Sandheads, Ganges A. J. Mihier. Twenty-four, 37-60 mm. 



delta. 



