rg2i.J Fauna of the Chilka Lake : Amphipoda. 545 



the other joints and the whole appendage bears fewer spinules ; at this stage there is 

 no trace of the rounded lobes on the carpus or propod. In older specimens, about 

 7-8 mm. long, the rounded lobe on the carpus is fairly well developed (fig. 8r), but 

 there is only a slight indication of the corresponding lobe on the propod. In still 

 older specimens, 9 mm. long, both lobes are apparent (fig. 8s), though not quite so 

 fully developed as in the adult male and the carpus has not yet attained its full 

 length, being only slightly longer than the propod. 



In the second gnathopod much greater differences are noticeable as the append- 

 age develops. In a specimen which I take to be a very young male (fig. 8t) it 

 has the same general shape as in the female, with the pellucid rounded lobe of the 

 propod well developed and the finger quite small; the propod is, however, less elong- 

 ated and broader in proportion than in an adult female. 



In a specimen 8 mm. long the appendage has acquired quite a different appear- 

 ance and resembles that of the mature males (fig. 8u), except that the propod still 

 bears at the postero- distal end a large rounded lobe, evidently corresponding to the 

 one found in the female and in the young male just described. The whole propod, 

 however, is much broadened, and the finger much larger and better developed ; the 

 palm is, however, transverse or only slightly oblique. 



In another male, 9 mm. long, the lobe on the hinder margin of the propod has 

 almost disappeared, there being left only a small trace of it at the end of the palm 

 (fig. 8v) ; the whole appendage and particularly the propod has increased in size 

 and the palm is more oblique, so that the characters of the adult male have been 

 nearly acquired. 



[Common with the preceding species, but never so abundant. N. A .] 



Hyale brevipes Chevreux. 

 (Text-fig. 9). 



Hyale brevipes Chevreux, 1901, p. 400. 

 . Hyale nilssoni (Rathke), var. kuriensis', Walker, 1904, p, 238. 

 Hyale nilssoni (Rathke), Walker, 1905, p. 925. 

 Hyale brevipes Walker, 1909, p. 337. 



Localities : — 



Off Samal Island, 8-15 ft. Several specimens, about 7 mm. long. 



Off Barkul. Several. 



8 miles W. by S. of Breakfast Island. One. 



2 to 8 miles N.B. |E. of Kalidai. Two. 



Ghiakhala Headland and neighbouring island. Several. 



Main channel W. of Satpara Island. Several. 



These specimens agree well with Chevreux' s description except that the 

 antennae are shorter and the eyes are round rather than pyriform. There is no 

 doubt also that they belong to the same form as the one described by Walker from 



