THE DEVELOPMENT OF RHINCALANUS 2II 



Body pear-shaped, tapering gradually backwards, with a dorsal line of segmentation 

 m the maxillary region. Furcal region with one pair of unequal setae, that of the right 

 side being the longer, and crossing dorsally over the left one. Labrum very large, more 

 or less rectangular, and fringed with fine hairs. 



F 'g- 3- 



Fi g- 4- 

 Rhincahinus cornutus, nauplius stages. 



Fi g- 5- 



Fig. 3 . Stage V, lateral view. Fig. 4 . Stage VI, lateral view. Fig. 5. Stage VI, ventral view. 1,2,3 

 indicate lines of division between somites dorsally. a, position of anus. 



Antennules (Fig. 2 A) with four apical setae, without aesthete; segments 1 and 2 not 

 clearly jointed, each with a small seta at end. The seta of segment 1 is very small, and 

 neither at this, nor in any later stage, has a proximal seta been seen on segment 2, although 

 two setae on this segment is the rule among Copepoda. 



Antenna with large molar process on coxa ; exopod with seven setae. 



