8S 



C. CHILTON. 



Fig. 5. Gammarus barringtonensis, first 

 gnathopod of female. 



Fig. 4. Gammarus barringtonends, first antenna. 



the first joint of peduncle 

 stout with a few spinules 

 at distal extremity, 

 second joint much more 

 slender and a little shorter 

 third segment rather 

 more than half as long as 

 the second ; secondary 

 flagellum usually with 

 four joints, primary flagel- 

 lum with about forty. 

 Lower antennae about 

 half as loug as the upper ; 

 peduncle and flagellum 

 withnumerous longsetae. 

 Mouth parts the same 

 as in G. australis. First 

 gnathopod (fig. 5) with 

 propod about as long as 

 the carpus, both with 

 numerous tufts of long 

 setae ; palm slightly 

 oblique, straight, finger 

 narrowing somewhat 

 abruptly about the mid- 

 dle and ending acutely. 

 Second gnathopod (fig.6) 

 longer and more slender 

 than the first; propod 

 slightly narrower than 

 , the carpus, palm rather 



Fig. 6. Gammarus barringtonensis, second 



gnathopod of female. more oblique than in the 



