
HALE—AUSTRALIAN CUMACEA 151 

of which is more prominent than the others; fifth somite little longer than fourth 
and not much longer than wide; telsonie somite a little longer than wide, poster- 
iorly rather well produced above bases of uropods. 
Kirst peraeopod with basis two-thirds as long as remaining joints together ; 
varpus only about one-tenth as long again as propodus and twice as long as dae- 
tylus, the longest distal seta of which is rather stout. 

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Fig. 2. Nannastacus inconstans, adult male, eristate form; lateral view and (eeph.) exphalo- 
thorax from above (X 59); 8, and ant, a., senlpture of carapace over branehial region, and 
anterulateral angle (> 185); prp., peraeopods (X 95); urop., uropod with fifth pleon and 
telsonic somites (> 95). 
Second peraeopod with basis barely longer than rest of limb; ischium not 
clistinetly made ont; carpus twice as Jong as merus, which is barely longer than 
the elongate dactylus; the last-named is twice as long as propodus with its 
lonvest distal spine longer than the joint itself, 
Posterior peraeopods long and slender; fifth pair fully as long as pleon 
with earpus about one-fourth as long again as propodus and more than three 
times as long as merus. 
Pedunele of uropod less than two-thirds as long as telsoniec somite and 
little more than one-third as long as endopod exclusive of its distal spine; 
exopod nearly one-third as long as endopod and with its terminal spine reaching 
to distal end of latter; endopod with two uneqnal spines at inner side of distal 
spine (which is more than half the length of the ramus) and with inner margin 
serrate for whole length but without articulated spines. 
Length 1-35 mm. 
Colour pale brown, the carapace margined with white in front and below. 
