
412 REcoORDS OF THE S.A. MusEuM 
pods. The tiropod has the peduncle not quite as long as telson and sixth pleon 
somite together (probably longer than these in adult male) but. fully twice as 
long as the rami; the proximal segment of the endopod does not differ in length 
from the distal so markedly. 
Length 2-65 mm. 
Loc. New South Wales: off Cape Three Points, 41-50 fath., bottom sticky 
mud and shell (‘‘Thetis’’ Station 13, Feb., 1898) ; 5 miles off Eden, 60 metres, 
on mud (K. Sheard, submarine light, Dec, 1943); 4 miles off Port Hacking, 
80 metres, on mud (type loc., K, Sheard, A. Trawl Station 13, May, 1944), Types 
in South Australian Museum, Reg. No. C. 2689-2690. 
The species attains a length of over 6 mm. 
GYNODIASTYLIS QUADRICRISTATA BP, NOV. 
Subadult female. Integument calcified, but thin and fragile. 
Carapace large, two-fifths of total length of animal; it is subovate as seen 
from above, robust, less than half as long again as deep, and almost as wide as 
deep; on the back a pair of longitudinal carinae, arising at base of ocular lobe, 
are flanked on each side by a short dorso-lateral ridge, which commences near 
the hinder corner of frontal lobe; these four carinae reach to about middle of 
length of carapace, where they are connected by short transverse carinae; from 

Fig. 39. Gynodiastylis quadricristata, type female; lateral view and cephalothorax from 
above (x 64). 
the last-named four longitudinal ridges extend to the crassate hinder margin; 
sides with a shallow depression, the upper edge of which is defined by a fairly 
well-marked curved ridge, the lower by a feeble fold. Antero-lateral margin very 
shallowly and rather angularly concave; antero-lateral angle and margin imme- 
diately posterior to it witha few teeth. Pseudorostrum pointed in front, triangular 
when viewed from above or from the side; lobes meeting for a distance equal to 
one-fifth of length of carapace. Frontal lobe very wide; ocular lobe wider than 
long, without apparent lenses, 
Pedigerous somites crowded, the first concealed on sides; third very short 
dorsally but pleural parts expanded fore and aft; fourth and fifth of equal length 
