I9 21 -] Fauna of the Chilka Lake : Amphipoda. 529 



flagellum of the first antenna is not densely clothed with fine hairs; perhaps the 

 specimen is not fully matured, though the second antenna has the long slender 

 flagellum characteristic of the male. The gnathopods are in minute agreement, even 

 as regards the armature of the palm of gnathopod 1. So are the peraeopods, uropods 

 and tels on. 



The other specimens also agree, but in some of them, which have not the 

 characteristic second antenna of the male, this appendage is distinctly longer than 

 antenna 1. Stebbing says, "Antenna 2 in the female shorter than antenna 1." 

 Possibly my specimens are immature males. 



Walker has recorded this species from Ceylon saying that his single specimen 

 agrees with British examples even to the dark brown blotches on the fifth and sixth 

 segments of the peraeon. My specimens are whitish with irregular reticulate 

 patches of black on various parts of the body and appendages, the colour being well 

 retained in the spirit specimens ; the eye is black. 



[Taken among filamentous algae on a muddy bottom in 5 to 6 feet of water. 

 N.A.] 



Paracalliope fluviatilis (G. M. Thomson). 

 (Text-fig. 3.) 



Calliope fluviatilis G. M. Thomson, 1879, p. 240, pi. 10c, fig. 4, 4a-c. 

 Paracalliope fluviatilis Stebbing, 1906, p. 297. 

 Paracalliope fluviatilis Chilton, 1909A, p. 55. 

 Pherusa australis Haswell, 1880, p. 103, pi. 7, fig. 1. 



Localities : — 



Off Samal Island, 8-15 ft., 22-ix~i3. Several. 



Off Barkul, 3-4 ft., 21-31-VÜ-13. Several. 



Off Barkul, at edge of lake, 21-VÜ-13. Several. 



Barkul, i8-iv-05. Several. 



East side of Rambha Bay. Several. 



Adyar River, outskirts of Madras town, 3-4 ft. Several. 



However unlikely it may at first appear these specimens agree in size, structure 

 and colour with the species, Paracalliope fluviatilis (G. M. Thomson), which is the 

 common one inhabiting freshwater streams in New Zealand.^ When first sorting out 

 the Chilka Lake specimens I was struck by the superficial resemblance of some of the 

 specimens in the pale orange colour and the long terminal peraeopods to the form I 

 was familiar with in New Zealand and careful comparison of specimens has convinced 

 me that they must be referred to the same species. I have previously pointed out 

 (1909A, p. 55) that the New Zealand species, in addition to inhabiting the fresh- 

 water streams, is also to be found in brackish water and at times in water that is 

 quite salt. It is found all over New Zealand and I have recently had specimens sent 

 to me from Cape Maria van Diemen in the very north. I have also specimens collected 

 in quite salt water in Auckland Harbour as well as those previously recorded from 

 Dunedin Harbour. Stebbing (1906, p. 297) referred to this species the form described 



