
HALE—AUSTRALIAN CUMACEA 411 
as long as propodus, which is a little shorter than merus and is two-thirds as long 
as dactylus. 
Fossorial peraeopods slender, the basis of fifth pair much shorter than that 
of the third and fourth pairs, in which it is fully ad long as the remaining joints 
together ; merus and carpus subequal in length, propodus only about half as long 
as either ; one of the two carpal setae is stout; longer than the other and, like the 
slender propodal seta, reaches the level of tip of the short and slender dactylus. 

a 
Fig. 38. Gynodiastylis margarita, paratype ovigerous female; c. pace, anterior portion of 
earapace (xX 50); ant. 1, first antenna (X 50; flagella, X 115); ant. 2, second antenna (x 115); 
mxp. and prp., third maxilliped and first to third peraeopods (X 50); 3 urop., uropod with fifth 
and sixth pleon somites, and telson (X 50; distal end of telson, X 150). 
In combination with the other characters the uropods are distinctive; the 
peduncle is wide, not dilated distally, is almost as long as the sixth somite and 
telson together, and is twice as long as the subequal rami, both of which have 
insignificant terminal spines; armament is nowhere pronounced, there being 
seven or eight spaced spinules on inner margin of peduncle and three on that of 
endopod, which is two-jointed, the distal segment two-thirds as long again as the 
proximal one. 
Length 5:3 mm. 
Juvenile male. Lower edge of carapace bent down instead of outwards as 
in the female and antero-lateral angle more widely rounded; ocular lobe a little 
wider, but. still exceedingly short. The uropods and other appendages are sub- 
stantially as in the female; exopods are present on the first four pairs of peraeo- 
