300 PROF. W. J. DAKIN ON THE 
EKULIMNADIA FERIENSIS, sp. n. (PI. II. figs. 14-18.) 
A considerable number of specimens, both of males and of 
females, was obtained from a little patch of flooded bushland at 
Northam. In the same pool occurred Branchinella and swarms 
of tadpoles. 
Shell (fig. 14) very thin and pellucid. Of same appearance in 
both sexes. No lines of growth visible. In lateral view almost 
equilateral. The dorsal margin slightly vaulted, the greatest 
height being only a shade in front of the middle. Shell 
compressed, 
Head (figs. 15 & 16). No great difference between the sexes. 
Rostrum short and bluntly rounded. 
Legs 16-18 pairs. Anterior pairs in males subchelate 
(fig. 18); not particularly robust. Armed with numerous sete. 
No process on inner side of band above thumblike projection 
(cf. figure of Hulimnadia cygnorum). 
Tail with caudal claws (fig. 17). The proximal part of the 
claws bears a few feathered sete. The region, not quite half of 
the total length, bears a well-marked sawlike row of minute spines. 
The two lateral plates terminate in two long processes, armed 
with minute denticles, and the upper edges of the plates in the 
female bear about 16 to 18 spines of unequal length. In the 
female there is also a tendency for the most posterior of the spies 
to be arranged in groups of 4 or 5, the size of spines in each 
group diminishing anteriorly (fig. 17). There are only about 
12-14 spines in the male. All the spines are armed with minute 
denticles. 
Size. Length of specimens 5°5 mm. 
KULIMNADIA RIVOLENSIS Brady. 
This species was described originally by Brady i in 1886. Up to 
this present report it was known from Southern Australia, 
Central Australia, and Southern Victoria, with the possibility of 
an extension into New South Wales. Now it has been found in 
Western Australia, and not where it might have been expected, 
inland on the goldfields, but down on the South-West Coast in 
small ponds near Busselton. Several specimens were obtained 
there by Mr. Alexander, and the collection includes both males 
and females. There is nothing further to add to the descriptions 
previously given by Brady, Spencer and Hall,* and Sayce. 
This was the only Hulimnadia obtained by the expedition to 
Central Australia. This discovery of its occurrence in Western 
Australia is particularly interesting, because it is the first 
Kulimnadia of the Kast and Central States to be recorded from 
the West. 
* Spencer and Hall, Reports Horn Expedition to Central Australia, Part II. 
