
HALE—AUSTRALIAN CUMACEA 365 
middle of length of carapace; there is a short ridge on each pseudorostral lobe, ex- 
tending from. apex to ocular lobe; the sides have several short carinae and, in 
lower half, four longer ones, the uppermost of which margins an elongate lateral 
depression, Antero-lateral margin not excavate below pseudorostrum; antero- 
lateral angle rounded and finely serrate, Pseudorostrnm prominent, the lobes 
raping glightly at apex; subacute in front as seen from the side, and meeting for 
a distance equal to nearly one-fourth of length of carapace. Frontal lobe well- 
defined ; ocular lobe subtriangular, little wider than long, with three small pale 
corneal lenses, 

Fig. 4. Gynodiastylis rochfordi, type subadult male; ant., frat antenna (> 56); mxp. and 
prp,, third maxilliped, and second and third peraeopods (x 56; propodua and dactylns 0. third 
leg, % 120); urop., uropod with fifth and sixth pleon somites, and telson (% 56); tels., lateral 
view of telson (X 80), 
First three pedigerous somites dorsally short, each shorter than fifth, which 
is not as long as fourth; the pleural parts of third are well produced backwards, 
so that second and third legs, particularly for a not fully adult male, are + quite 
markedly separated, 
Pleon fully as long as cephalothorax; fifth somite quite half as long again as 
sixth, which is only slightly expanded posteriorly and is not much wider than long; 
telson as long ss sixth somite, subcordate, with lateral margins feebly serrate and 
with a pair of slender terminal spines, just anterior to which is an upstanding 
bristle on each side; one-fourth of total length of telson is post-anal, 
First joint of first antenna about as long as rest of peduncle; second segment 
three-fourths as long as third ; flagellum two-jointed, not as long as second pedun- 
eular joint, and accessory lash three-jointed, fully half the length of main 
flagellum. 
Third maxilliped as long as the remaining joints together; carpus, propodus 
