DEVELOPMENTAL PHASES 347 



Metanauplhis. No specimens in this stage were encountered. The metanaupliar stage is very 



transitory and the larva begins to eat only in the next stage. It is probably almost identical with the 



metanauplii of other species of this genus (cf. Lebour, 1925; Boden, 195 1). 



First calyptopis. Description based on examination of six specimens (Fig. ^a-c). Length range 



0-98-1-10 mm.; average length 1-03 mm. Carapace length 0.60-0-63 mm.; average length 0-62 mm. 

 The carapace is a long, high, narrow dome covering the entire anterior part of the body, and it has 



no projections of any sort along its inferior margin. 



OSmtn 



0-5 mm 



H 



Fig. 3. Nyctiphanes capensis. a, egg; b, nauplius, lateral view; c, nauplius, dorsal view; d, pseudo- 

 metanauplius, lateral view ; e, pseudometanauplius, ventral view. 



The single median eye is visible with the ocular plates on either side of it bearing the rudimentary 

 ocular luminous organ. 



The first antennae project forward and downward and are to all intents uniramous. The rudiments 

 of the inner ramus can be seen, however, bearing three setae. The outer ramus carries five terminal 

 setae. The setae are naked. 



The second antennae project outward and downward and are carried on a peduncle having two 

 segments. The anterior and longer ramus of the antennae is unsegmented and is armed terminally 



