DEVELOPMENT OF EUPHAUSIA SUPERB A 89 



Antennule. The flagella are multi-articulate and rather longer than the two distal 



peduncular segments. The spine on the outer margin of the basal peduncular segment 



extends to about the middle of the distal segment (Fig. 21 b). A lateral view of the 



peduncular segment is shown in Fig. 21 e. 



Fig. 21. Fourth Furcilia. 



a, lateral aspect ( x 9) ; /, antenna ( x 35) ; 



b, rostrum and antennules ( x 35) ; a, mandible ( x 83) : g', tip of palp ( x 83) ; 



c, telson ( X 83); fi, first maxilla, spinules on bristles omitted ( x no); 



d, uropod and telson ( x 35) ; y, second maxilla ( x 35). 



e, antennule, lateral view ( x 35); 



Antenna. There is only a faint indication in the antennae of differentiation into a 

 scale and flagellum in the specimen figured (Fig. 21 /), but the variations in the form of 

 this appendage are dealt with on p. 60. In this specimen the endopod is broader in 

 proportion to its length than in earlier stages, but the number of bristles is unchanged. 



