
HaLeE—ADSTRALIAN CUMACEA 375 
almost two-thirds as long as the ramus; longer of the unequal terminal spines of 
exopod a little longer than that of endopod. 
Colonr white, Length 5 mm. 
Loc, New South Wales: Ulladulla, Brush Island, 44 fath., in fine silt on flat- 
head grounds (D. Rochford, Jan,, 1945). Type im South Australian Museum, Reg. 
No. C. 2704, 
Large-eyed. male. The considerable differences between fully mature and sub- 
adult males in Allediastylis and Zimmeriana gen. noy. lead one to place here a 
large-eyed adult male which agrees with the type in plan of seulpture and generally 
in the proportions of the appendages. It may be that two forms of mature male 
oceur, or that this is the ultimate male form. of the species, Uufortunately, in 
many of the Diastylids now dealt with females are taken far more frequently than 
are males, and the notes on this sex in. @ynodiastylis and allied genera are based 
upon only a few specimens, 
a The following comparative details concern the large-eyed male in question 
g. 11). 
The integument is semi-transparent, of almost glass-like brittleness; carapace 
with distinet reticulations, which are much larger on posterior portions of sides 
than elsewhere, Pleon with imbricate patterning. 
Carapace one-third of total length of animal and not much wider than deep; 
the earinae are swollen, the lower lateral one in particular more in the nature of a 
fold surmounted by a carinate line; seen from the side the dorsum exhibits the 
same indentation at middle of length because of the tumid branchial regions and 
elevated mid-line of anterior half. Antero-lateral margin not at all excavate; 
antero-lateral angle rounded, with three or four insignificant blunt dentieles, and 
inferior margin not serrate towards front. Pseudorostrum of same length as in 
type but decidedly downbent, Frontal lobe very large, with sutures distinct; 
veular lobe swollen, more than one-third as wide as carapace, not quite twice as 
broad as long, constricted somewhat at basa and with three big, colourless oval 
Jenses, which exhibit distinet granular strueturé, 
Pedigerous somites with dorso-lateral earinae swollen, 
Telson with a pair of short terminal spines, flanked on each side by a single 
more slender gpine; lateral margins distinetly serrate. 
The second antennae are furnished with exceedingly dense sensory setae; 
the flagellum is not longer than peduncle, 
Third maxilliped with basis more than one-third as long again as remaining 
joints together. 
First and second peraeopods as in type excepting that the dactylus is definitely 
longer ; that of the first is more than half length of propodns, that of second half 
as long again aa propodus. 
Recond segment of endopod of uropod with only two spines on inner margin 
but with terminal spine almost as long as the whole ramns. 
Length 2°75 mm- ; 
foc, New South Wales: off Eden, 30 metres, in coarse sand (K. Sheard, 
A, Trawl, Oct., 1943), 
A juvenile male, 2:24 mm, in length, and with exopods of third and fourth 
peracopods not fully developed, was taken by Mr, Sheard eleven miles off Eden, at 
a depth of 120 metres; while in many respects resembling the examples described 
aboye, this differs in having the first legs relatively longer, the carpus reaching for 
fully half ite length beyond the apex of pseudorostrum. The endopod of the roped 
is three-segmentate, the first joint not quite as long ag second and third combined, 
and the second shorter than third, This is tentatively regarded as a-young example 
of dilatata, but may represent another species, 
