
HALE—AUSTRALIAN CUMACEA 391 
Pleon nearly half as long again as carapace; telson with rather long and 
slender apical and lateral spines and distinct serrations (fig. 23, tels.) 
First antenna with flagellum three-segmentate and as long as last joint of 
pedunele; accessory lash small, apparently single-jointed. Second antenna with 
the eleven-segmentate flagellum more than half as long again as the slender 
pedunele. 

Fig. 23. Gynodiastylis ambigua, ovigerous female and adult male of small, slender form —C ‘ 
jJateral view of male and (ceph.) cephalothorax of both sexes from above (X 43); e pace., 
front of carapace ( X 66); ant., first and second antennae (X 66) ; prp., first to third peraeopods 
(X 66); urop., uropod with fifth and sixth pleon somites, and telson (x 66); tels., distal end 
of telson (* 200). 
First peraeopod with carpus barely exceeding the antennal angle; basis only 
one-third as long again as combined lengths of remaining joints, which are much 
as described for the type female. 
Second peraeopod. with exopod longer than basis, which is little more than 
twice as long as rest of limb; ischium relatively large but shorter than either 
rate! or carpus, which in turn are shorter than either the subequal propodus or 
tylus, 
