113 
Jour. llov. Roc. Westerx Australia. Vol. XII, No. 13. 
Coiitrilnitions from the Deportmejit of Biology, University of 
Western Australia. No. 5. 
Description of a new Species of Uroctena from South-Western 
Australia, l)v George E. Nicholas, D.Sc.. F.L.S.. Professor Oi 
Biology ill the I, niversit^'^ of Western Australia. 
{Bead July 13, 1026. Puhlishcd July 20, 1926.) 
While the plates were in jireparation for my paper on the 
g('uus Uroeteiia, read at the recent meeting of this Roc-iety, I 
ehaneed to olitain a number of speeimeus of yet another species 
of fresh water Amphipod, referable to this genus. It may be 
readily distinguished from tliose previously described by the pos- 
session of well developed eyes and tlie much less strongly developed 
second antenna. 
The s])ecies is named in compliment to Mr. H. C. Yelland, 
M.B.U, in whose comi)any this ])articular collecting expedition was 
made and to whose most enthusiastic assistance on several recent 
occasions I am much indebted. 
Uroctena yellandi sp. nov. 
Plate XIV. Figs. 1-10 and Text Fig. 
Specific dfupao.v/.s,— Near to U. affinis but with conspicuous 
v\hite eyes. Regments 2-5 of the pleon Avith long delicate setae, 
a lateral tubercle near margin of pleon segments 1-3, the urus 
Avith laterally placed spinous setae. 
Anrtenna 1 nearly three fourtlis the length of the body; 
accessory flagellum Avith four to six joints. 
A)itenna 2 only moderately stout in the male, flagellum ten 
jointed relatively longer than in IJ. westraJis. Each segment Avith 
a terminal ring of fine setae, the terminal joint of the peduncle 
witli four such rings of setae. The appendage is shorter and more 
slender ill the female. 
(hiaihopod 2 differing from gnathopod 1 little in size or shape 
in the female, but in the male much larger. The armature of 
sjiines on innei' aspect of the l)asos of gnathopod 2 little devcl- 
