4.76 MARGUERITE HENRY. 
.arow of bristles and there is a group of bristles on the 
postero-ventral corner. 
The eye is of moderate size; the ocellus is smaller and 
situated closer to the eye than to the tip of the rostrum. 
The antennules are not as long as the rostrum, but the 
sensory tufts of filaments at their apices reach beyond its 
tip. 
The tail-piece (fig. 12) is strongly built, of almost uniform 
width throughout; the supra-anal angle is not very distinct; 
there are twelve pairs of short thick spines present on the 
infra-anal margin, and also a row of about ten lateral combs; 
the end-claws are strong, each with a secondary denticle 
which reaches half its length; the denticles each bear a 
row of spinules. 
Specific Characters.—Oarapace seen laterally oblong 
oval, obliquely truncated behind, dorsal margin arched, 
ventral straight, curving posteriorly. Head depressed. 
Rostrum reaching below the ventral edges of the valves. 
Surface of the carapace pitted. Ocellus smaller than the 
eye, closer to it than to the tip of the rostrum. Tail-piece 
broad, with twelve pairs of short, thick infra-anal spines, 
and ten lateral combs; end-claws strong; secondary 
denticies long, each bearing a row of spinules. 
Locality.—This form was collected at Byron Bay in 
January. ‘ype specimen in the Australian Museum, No. 
P 4332, 
ALONA WHITELEGGII Sars. 
This species was described by Sars in “‘Freshwater Ento- 
mostraca from the neighbourhood of Sydney.’’(!) 
This form was abundant at Kendall during the summer 
months. It is recorded by Sars from Oentennial Park, 
Sydney. 
