
392 RECORDS OF THE S.A. MUSEUM 
Third and fourth peraeopods both without trace of exopods, and in other 
respects resembling those of female; the propodal seta is short. 
Pedunele of uropod very slightly longer than telson and with two slender 
short spines near distal end of inner margin ; endopod as long as peduncle, divided 
into. two joints subequal in length (three-segmentate in all females), each with 
four spines on inner margin; exopod more than half, but less than two-thirds 
length of endopod. 
Colour white. Length 2°5 mm, 
Loc. New South Wales: Ulladulla, Brush Island, 45 fath., im fine silt on 
flathead grounds (D. Rochford, Jan., 1945). Types in South Australian Museum, 
Reg. No. C, 2693-2694. 
While this species in some respects resembles laevis (Calman, 1911, p. 371, 
pl. xxxv, fig. 32-89) the uropods and armed telson are yery distinctive. 
As the male is known only in the last of the three forms described and as 
the females resemble each other in the character of the appendages they are 
regarded. provisionally as variants of one species. The differences between the 
robust (B) and attenuate (C) varieties, in both size and form, are, as mentioned, 
very striking. 
GYNODIASTYLIS ATTENUATA 8p, NOV, 
Adult male. Carapace completely smooth, almost one-third of total length 
of animal and as long as pedigerous somites and first pleon somite together ; it 
is very slender, barely wider than deep, more than two and one-half times as long 


Fig, 24, Gynodiastylis attenuata, type male; 
Jateral viow and cophalothorax from above (> 51). 

as deep, and with dorsal margin from posterior end to ocular lobe, almost straight. 
Antero-lateral margin scarcely at all excavate and antennal angle rounded, 
without denticles. Pseudorostrum a little downbent, narrowly subtruncate in 
front both as seen from above and from. the side, the lobes meeting for a distance 
equal to nearly one-fifth of total length of carapace. Frontal lobe with sutures 
distinct; éye-lobe subtriangular, longer than wide, with three faintly marked 
ocular areas. 
