
416 RECORDS OF THE S.A. MUSEUM 
First peraeopod stout, not reaching much beyond apex of pseudorostrum when 
extended ; basis serrate on inner margin, distinctly shorter than remaining joints 
together; ischium and, merus (like basis) with a tooth at inner distal angle; 
carpus and propodus subequal in length, each twice as long as dactylus; only two 
or three propodal setae. 
Second peraeopod shorter than third or fourth, with exopod (not including 
setae) as long as the basis, which ig one-third as long again as the rest of limb; 
ischium distinct; merus, carpus and propodus not differing much in length, each 
about half as long as dactylus, 
Second to fifth peraeopods moderately robust; merus shorter than basis, and 
much less than twice as long as carpus and propodus combined ; carpus with three 
distal setae, all slender, the longest, like propodal seta, reaching to level of tip 
of slender dactylus. 
Peduncle of uropod barely longer than telson, with an inner spine at distal 
end; endopod. with inner margin serrate, a little longer than exopod which is 
equal in length to pedunele; two-jointed, the first joint with three inner spines 
and three-fourths as long as second, which bears two inner spines, the second 
distal; the long‘ terminal spine is less than half the length of the ramus; exopod 
with longer of the unequal terminal spines more than half as long as the ramus. 
Colour white. Length 3:1 mm. 
Loc. New South Wales: 4 miles off Eden, 70 metres, in silt, type loc., 
K. Sheard, Oct., 1943) ; 4 miles off Port Hacking, 80 metres, on mud (K. Sheard, 
A. Trawl, May, 1944) ; Ulladulla, Brush Island, 45 fath., in fine silt on flathead 
grounds (D. Rochford, Jan., 1945). Type in South Australian Museum, Reg. 
No. C. 2656. 
Two ovigerous females from the type locality are smaller than the type 
(2-7 mm.) and than, adult females from Brush Island, but differ only in having 
the appendages slightly more slender, although the joints are of the same pro- 
portions. 
GYNODIASTYLIS CONCAVA sp. nov. 
Ovigerous female, Integument dull, with small but distinct reticulate pat- 
terning. 
Carapace less than one-third of total length of animal, as wide as deep, one- 
third as long again as broad, and with each side deeply concave; the lateral hollow 
is somewhat quadrilateral and is margined below by a longitudinal ridge, its rear 
edge forms a transverse carina and its upper limit is defined by a dorso-lateral 
fold, which extends back quite to posterior margin of carapace; dorsum depressed 
between hinder third of dorso-lateral ridges, slightly rounded (almost flat) over 
frontal lobe; seen from above the carapace is subtriangular in shape, tapering 
to the front and broadest across branchial regions; viewed thus the outbent inferior 
edge is visible at the rear. Antero-lateral margin deeply concave, antennal angle 
subacute and inferior edge posterior to it finely serrate. Pseudorostrum subacute 
in front when viewed either from above or from the side, the lobes meeting for 
a distance equal to fully one-fifth of total length of carapace. Frontal lobe large, 
distinctly separated off ; ocular lobe rather small, twice as wide as long, rounded 
and with three small, pale eyes. 
Pleural parts of all pedigerous somites exposed, but those of first. partly over- 
lapped by anterior pleural lobe of second ; third somite, like second, short dorsally, 
but moderately expanded fore and aft on sides, where it overlaps second in front ; 
second and third peraeopods not very widely separated; there is a dorso-lateral 
carina on each side of fourth somite. 
