866 



MRS. E. W. SEXTON OX AMPHIPODA 



[Nov. 23, 



^Sujjerior antenna. Female (fig. 34). —First joint of the peduncle 

 broad, with several dentiform apical projections ; it carries a fan 

 of fine setae distally, and several sensory ciliated hairs ; 4 long 

 sensory hairs above and 7 or 8 small ones, and a transverse row 

 of the small ones on its inner surface. The 2nd joint is longer 

 than the 1st, also apically dentate, with curved spines ; the 3i'd 



Text-fiff. 278. 



JSusirus hiscai/ensis Bonnier. 

 Second gnathopods of the female, showing the abnormal right gnathopod. 



joint small, widening distally, spines curved. Primary flagelhtm. 

 In the two specimens examined the tips were broken, 32 joints 

 remaining. The 1st joint is the largest ; from the 9th-27th the 

 joints vary in length, short ones carrying the long sensory fila- 

 ments alternating with longer ones provided with small setae only. 

 The filaments are set in groups of 3 to 5 on the outer side of 

 the antenna, the middle filament of each group being double the 

 length of the others, equalling in length the six succeeding joints. 



