22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



First antenna (fig. 9c): divided by sutures into about 8 joints; 

 long annulate bristle dorsally near middle, 6-7 bristles terminally. 



Second antenna (figs. 9d, i): exopodite with 11 joints; joints 1-3 

 without bristles; joints 4-10 each ^\dth 1 hirsute bristle; joint 11 

 with 1 short and 1 long bristle; endopodite consists of small mode 

 without bristles. 



It is interesting to note that the 2nd antennae on embryos of 

 Gigantocypris agassizi Miiller, 1895, examined by Poulsen (1965, 

 p. 37) also had more joints than on the adult. Hairs on bristles of 

 the exopodite on the embryo are longer than on the adult, suggesting 

 that the larvae after hatching are capable of swimming. Joints 1-3 

 of the exopodite on embryo are equivalent to the 1st joint on the adult. 



Mandible (figs. 9e, ?') : coxale with short bristle proximally; basale 

 with 4 or 5 subequal bristles ventrally; endopodite 3-jointed; each 

 joint with weakly sclerotized claw. 



Maxilla (figs. 9/, ^): protopodite with short anterior bristle; en- 

 dopodite has 1st joint with spinous alpha and beta bristles; 2nd joint 

 with 3 denticulate b- and d-bristles; 3(?) endites, each with 

 bristles, some bristles with marginal spines. 



Fifth limb (fig. Qi) and 6th limb (figs. 9^, i) : leaflike hirsute. 



Fiu"ca (figs. 9^, i) : each lamella with 3 claws; all claws with marginal 

 spines; anterior margin of right lamella above claw no, 1 with clusters 

 of hairs (not showTi in figm'e). 



Frontal organ: minute, transparent, 1-jointed. 



Eyes: not observed. 



Description of female instar hi (fig. 10). — SheU: lateral view 

 oval, without rostrum; posterior truncate, with caudal process. 

 Measurements of selected specimens are as follow^s: 



Fii'st antenna (fig. 10a): fourth joint without ventral bristles, 

 otherwise similar to adidt female. 



Second antenna (fig. 106) : endopodite 1-jointed, with small terminal 

 bristle and 1 short dorsal bristle; exopodite 9-jointed, similar to adult 

 female; joints 2-6 with terminal comb of short spines; bristles of 2nd, 

 3rd, 9th joints with short spines proximally along outer margins. 



Mandible, maxilla: similar to adult female. 



Fifth limb: similar to adult female except for having only 2 bristles 

 on 2nd joint of exopodite. 



Sixth limb (fig. 10c) : leaflike with hu'sute margin and 1 terminal 

 bristle. «- 



