478 MARGUERITE HENRY. 
recorded from Hurope, North and South America, Asia, 
Iceland and the Azores. 
Genus DUNHEVEDIA King. 
DUNHEVEDIA CRASSA King. 
This form was first described by King in ‘‘Australian 
Entomostracans.’’'® <A more detailed description is given 
by Sars in ‘‘Additional Notes on Australian Cladocera.’’() 
This species was obtained at Sydney University in June, 
and at Cumbalum in January. King records this form from 
Dunheved (St. Mary’s, N.S.W.), and Varraville near Denham 
Court, N.S.W. It has also been recorded from Ceylon. 
Genus PLEUROXUS Baird. 
PLEUROXUS RETICULATUS sp. n. 
(Plate XLII, figs. 13, 14.) 
The length of the adult female is 0°31 mm. Seen later- 
ally, the carapace is oblong oval in shape, the greatest 
height being 0°20 mm., and occurring somewhat in front of 
the middle. 
It is narrowly truncated posteriorly, the posterior edges 
being straight. The dorsal margin is strongly arched, the 
ventral edges of the valves are straight in the posterior 
part, curving up to the anterior edges somewhat suddenly. 
A blunt denticle is present at the postero-ventral corner. 
The dorsal margin of the head forms a continuous, even 
curve with that of the carapace; the rostrum is long, 
slender and sharply pointed. The surface of the carapace 
is marked by a reticulate sculpturing as well as by a number 
of minute pits joined together so as to form a superimposed 
network of marks. The ventral edges of the valves are 
fringed each with a row of bristles. 
The eye is large; the ocellus is about half as large and 
is situated very much closer to the eye than to the tip of 
the rostrum. 
