276 



On Hyale grenEelli, CJiilton. 



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

 the same as the first, but is very slightly larger, and the 

 side-plate differs in being regularly rectangular and not 

 widening below ; the other joints of the appendage show no 

 differences from the first worthy of notice. 



In other characters the female closely resembles the male. 



Nearly all the males are ap])arently fairly well developed, 

 and show the characters of the second gnathopod and the 

 maxillipeds nearly as originally described. In one which is 



Fiff. 3. 



Hrjale yrenfelli, 5 . Second gnathopod. 



about 5 mm. in length the terminal joints of the 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 

 stout, almost as in the typical male. Doubtless in still 

 3'ounger 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. 



