Nichoj.ls — Two New PhreatoivUls. 
18(i 
said to have four or five sueli setae. In the latter s]ieeies aud in 
P. assimiUn tliere are iii addition two siinjde seta(', while in P. 
fihcpliardl none are figured; P. joyneri has one only. 
The pluniose setae in this form, however, are unusually stout 
and densely set with a terniinal tuft of setae (resi'inlding rather the 
penicilla of Oniselds) and differing in this, if one may judge from 
the figures, from the other sjieeies of Phreatoicus. Another differ- 
ence is furnished a])parently by the ])resenee of a ('urv'ed ridge (PI. 
XX\ I, fig. 8a) stretching along the surface of the inner lobe and 
bearing numerous long setae. The structure of the second max.dhi 
(PI. XXVI, fig. 10) of P. joyneri is almost exacdly that of the corres- 
])onding ajijHuidage in P. austr(dis, excejiting that the inner lobe is 
narrower distally, tlie outer lolie and tlu' palp ha\'ing fewer setae, 
whi(di are pectinate in the usual manner; tlie usual tuft of setae 
at the base of the ])a.l]) is not to be made out. 
In the maxdUpeds (PI. XX^A, fig. 11) the epipodite is perhaps 
rather broader and bears but three lateral setae. Pimn the inner 
plate two stout coupling spiiu's only are ])resent and along its whole 
tr(‘(‘ border it is fringed with long aud stout plumose setae, tlie 
apical setae being feebly plumose or jiectinated; the inner distal 
angle, in both meros aud carjius is markedly jiroduced. 
The <iitatho]i(^d (PI. XXV, fig. (i) is of the usual sub-chelate type. 
The limb is stout, the basos liaving a length l)arely twice that of 
its greatest width; the ant[nior margin of this joint is wholly free 
from setae, whereas in the succeeding appendages the corresponding 
joint is strongly setose. In the adadt male, tin* ])ro])od has almost 
exactly the form of tlu* corresjioinling joint in P. nuslralis, but is 
free from setae on the lateral surfaces, while the jiosterior border 
pro.ximal to the jialm is jilmost straight, whereas in ]\ austraUs it is 
figured as concave. The palm (PI. XXV, fig. 6a) is raised into a 
narrow saw-like edgt*, the simple <iistal spiniform si'tae jiassing into 
broadened serrate scutes (Se) at the more proximal end. The dactyl 
has about ten, almost e()uidistant, s(dae on its concav(‘ (jiosterior) 
margin, with four or five on the convwx surface. A similar setose 
(‘omlition of the dactyl is figuianl ((^hilton 1894) for P. assimills ami 
descifibed (1891, p. 161) in P. austraUs, bnt is otherwise uimn-orded. 
There is a small terminal tuft of setae also, one of the these being 
somewhat similar to the sensory setae found on the first ant(mnae 
and named “olfactory cylinder.” This subajiical tuft is jiresent on 
the su<-ceeding apjiendages (PI. XXV, fig. 7a) and, indeed, appears 
to be of very general occuri'ciice in the Phreatoicidea, though reduced 
ajiparently to a single seta in some species (cf. A. palnstris (Glauert), 
1924, fig. 3), In the female, the appendage is very similar, but the 
propod is rather less strongly developed. 
