
HALE—AUSTRALIAN CUMACEA 395 
Pedigerous somites spinose, the spines largest on dorsum, where a dorso- 
lateral, slightly elevated row-occur on each side of second to fifth; plumose hairs 
48 On carapace; first and third somites shorter dorsally than the others; pleural 
parts of second and third produced forwards, those of third to fifth backwards. 
Pleon as long as cephalothorax, sparsely spinulose dorso-laterslly and 
ventrally, with spinules on sides (see fig. 26), and with plumose setae on venter; 
somites stout and rather short, the fifth not much longer than sixth, which is 
somewhat wider than long; telson longer than any other of the plaon somites, 
subcylindrical, but with a short, tapering, post-anal portion armed with two small 
terminal spines (fig. 27, tels.). 

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( Fig. 26, Gynodiastylis echinata, type female; lateral view and cephalothoras from above 
x 87), 
First and second peduncular joints of the short first antenna armed with 
spines; first joint stout, nearly as long as rest of peduncle and flagellum together ; 
third joint twice as long as second, and equal in length to the two-jointed majn 
flagellum; accessory flagellum very small. 
Second antenna three () jointed, spinose. 
Mandible with about ten spines. 
Third maxilliped with basis to carpus spinulose; basis stout, about as long 
as remainder of limb and with apex not dilated, but a little forwardly produced 
at outer distal angle; propodus a little longer than either merus, carpus or 
dactylus, which are subequal in length. 
All perseopods spiny. First pair short, the carpus barely reaching level of 
antennal angle; basis wide, about two-thirds as long as rest of limb; carpus twice 
as long as merus, and only about one-fourth as long again as the long propodus, 
which bears a single long distal seta; dactylus about half as long as propodus, with 
a terminal brush of setae, one stouter than the others, 
Basis of second peraeopod large, as long as remainder of limb; ischium sup- 
pressed ; merus, carpus and propodus subequal in length, each only about three- 
fourths as long as dactylus, the longest terminal seta of which is as long ag 
propodus and dactylus together. 
Basis slender in third to fifth peraeopods, as long, or almost as long, as 
remaining joints together in third and fourth, shorter in fifth; merus not as. 
long as carpus and propodus together and less than half as long as basis in all; 
apart from length of basis these limbs differ little in size. 
