27G 



On Ilvale g-ronEcUi, CJi'tlton. 



in the male. The second gnathopod (fig. 3) is almost exactly 

 the same as the first, but is very slightly lar<;er, and the 

 side-plate differs in being reguhuly rectanguhir and not 

 widening below ; the other joints of the appendage show no 

 differences from the first worthy of notice. 



Jn other characters the female closely resembles the male. 



Nearly all the males are apparently fairly well developed, 

 and show the characters of the second gtiathopod and the 

 maxillipeds nearly as originally described. In one which is 



Fiff. 3. 



Hyale yrenfelli, 5 . Second guathopod. 



about 5 mm. in length the terminal joints of tlie maxilliped 

 are rather less expanded and not quite so setose, and in the 

 second gnathopod the propod is not so wide, the palm is more 

 oblique and much less concave, being nearly straight or only 

 slightly concave, and its outer and inner borders are less 

 widely separated ; the dactyl, however, is short and fairly 

 s^out, almost as in the typical male. Doubtless in still 

 younger specimens of the male these appendages would show 

 the characters of the male to a still less extent and be more 

 like those of the female. 



