New Victorian Fresh-water Anvplajpoda. 55 



ized in l^eing without the slightest trace of eyes. It is also more 

 differentiated in the male, the hands of the gnathopoda being 

 conspicuously stronger and the wrists shorter, also the lower 

 antennae possess calceoli, which are not to be seen in G. 

 australis. 



I have had the opportunity through the kindness of Mr. G. M. 

 Thomson, of New Zealand, of examining his Niphargus mortoni, 

 from Tasmanian fresh-waters, which is certainly congeneric witli 

 the two species just mentioned, and is in rather close agreement 

 with G. australis. He provisionally placed it in the genus 

 Niphargus, and some may think it necessary to institute a fresh 

 genus to receive these three forms, but the characters are so close 

 to those of Gammarus, that it does not appear to me to be 

 necessary. The number of dorsal spines on the urosome are 

 certainly few, but in respect to the mouth parts and other 

 featui'es they are quite normal. Thomson's species has normal 

 eyes like G. australis, and has the coxal-plates shallower than in 

 that species, the dorsum is not clothed with nearly so many fine 

 spinules, the inner branch of the terminal uropoda is shorter and 

 inner ran)us much shorter, the upper antennae have a smaller 

 secondary appendage and relatively rather longer terminal 

 peduncular joint, also the body and appendages are not nearly so 

 setose. 



The above new species is named in compliment to Mr. J. F. 

 Haase, who collected it. 



Supplementary description. — In all I received 11 specimens, and 

 4 of these are males. 



Eyes. — There is not the slightest trace of any crystalline lense 

 or pigment. 



Mouth parts. — These agree very closely with those of G. 

 australis and G. mortoni, and call for no special mention. 



Upper Antennae. — The first antennae of the male compared 

 with the female is rather longer, being about four-fifths the 

 length of the body, while in the female it is not more tlian 

 two-thirds, and the flagellum has respectively about 50 and 40 

 joints. In each sex the flagellum has, be.sides a large number of 

 ordinary tactile setae, on the inner side of each joint, except 

 above the fir'st ten and the last three or four, a single "olfactory 

 cylinder," also the peduncle bears on the first joint about five or 



