6 KARL YNGVE SCHWARTZ, DESCRIPTIONS OF TWO AUSTRALIAN PHYLLOPODA. 
caudal appendages are long and slendar. No egg-masses were present in the single 
specimen obtained. 
. 
Description of the male. 
In many respects the male differs distinetly from the female. It seems to 
have a more elongated shell than the latter. The length of the shell of the single 
specimen obtained measures 23 mm, whereas the height attains 14,2 mm and the 
thickness through both valves 4,8 mm. The lines of growth are nine in number. In 
the male the rostrum in longer and more prominent and less blunt than in the 
female and further is more distinetly defined from the frontal region, forming a well- 
marked right angle with the lower surface of the head. 
Fig. 2. Shell of the male Fig. 3. The male speci- Fig. 4. Hooks of the two 
specimen viewed from men without shell from first right-sided feet of 
right side; magnified right side; magnified the male; magnified about 
about 1 ?/7 times. about 1/7 times. 8 times. 
First antennae longer than in the female and longer than the proximal undiv- 
ided part of the second antennae and for the rest nearly uniform with those of 
the female. 
Number of pairs of feet about thirty. In the male the two anterior pairs 
are armed with yellowish chitinous grasping pincer-like organs, each consisting of a 
curved claw, movable upon a shortly rounded part bearing on its inner face a small 
lobe. 
General distribution. 
Namoi ; Biver, New South Wales; Wamoi River, South Australia (BAIRD); 
Alice Springs and country between Oodnadatta and Charlotte Waters, Central Au- 
stralia (SPENCER and HALL). 
