
370 RECORDS OF THE S.A, MUSEUM 
fore and aft, the second and third legs well separated; fourth somite completely 
ankylosed with third and with a pair of widely separated longitudinal carinae on 
the back; the dorsolateral parts of this somite, like the posterior portions of the 
sides of the carapace, are marked with numerous very short and inconspicuous 
horizontal ridges. 
Pleon stout, longer than cephalothorax; fifth somite slightly depressed, more 
than half as long again as sixth, which is a little widened posteriorly, where it is 
barely broader than long; telson about as long as sixth somite, elongate cordate, 

( ae 7. Gynodiastylis robusta, type female; lateral view and cephalothorax from above 
™ 28), 
laterally serrate, and with post-anal part half as long as proximal; apex with 
pair of short spines, flanked by a spine on each side, 
First antenna relatively rather small (drawn to a larger scale than other 
appendages in fig, 8); first joint of peduncle stout, but more than twice as 
long as wide, half as long again as second and third segments together; third 
narrower than, and three-fourths as long again as, second; flagellum as long as last. 
peduneular joint and with two equal joints; accessory lash three-jointed, less than 
half length of main flagellum, 
Third maxilliped not elongate; basis as long as remaining joints combined, : 
and with the setae at outer distal portion unusually short; basis, ischium and 
merus with an inner distal tooth; carpus, propodus and dactylus subequal in 
length. 
Distal joints of first peraeopod missing. 
Second peraeopod large, slightly longer than third, and reaching just beyond 
antennal angle when extended forwards; basis about as long as exopod and more 
than half the length of rest. of limb; ischium distinct and quite large; the three 
distal joints are elongate; carpus two and one-half times as long as merus and 
fully twice as long as propodus, which is as eqiial in length to dactylus. 
Third and fourth peraeopods differing Jittle in length; they are robust with 
basis much shorter than rest of limb, and merus as long, or almost as long, as the 
