DEVELOPMENTAL PHASES 369 



and the sixth is present as a simple bud. The second to the sixth bear gill-lobes, those on the sixth 

 being more arborescent than those on the more anterior cormopods. 

 The pleopods are all setose. 



10mm 



Fig. 19. Euphausia tenera. a, fourth furcilia, lateral view; b, telson and uropods; 

 c, fifth furcilia, lateral view; d, second antenna; e, telson and uropods. 



The number of terminal spines on the telson is now reduced to five. There are still three pairs of 

 postero-lateral and one pair of ventro-lateral spines. The lateral uropods are now strongly developed. 



Fifth furcilia. Three specimens present. All examined and measured. Length 6-3 mm. (Fig. 

 19 c, d, e). 



The second antenna is no longer natatory. The endopod is segmented and the exopod is scale-like 

 with a strong tooth situated proximally at the outer margin. 



The sixth cormopod is now bifurcate and carries a complex gill structure. 



5 D 



