DE. W. M. TATTEESA.LL ; AMPHIPODA AND ISOPODA. 13 
at its apex. The outer ramus bears two recurved hooks of equal size and a 
short, blunt spine near the proximal end of the doi'sal surface. In the light 
of Chevreux's description of G. hrevidactyla and of the present species, 
Stebbing's diagnosis o£ the genus Grubia in ' Das Tierreich ' will require 
emendation in the following points : — antenna 1 has a short accessory 
flagellum of one or two joints, and maxilla 1 the inner plate with a few 
small lateral setae. 
The present species is distinguished by the form of the first and second 
legs and, possibly also, by the structure of the third uropods. 
ISOPODA. 
Tribe FLABELLIPEUA. 
Family SPH.EROMID.^. 
Group Hemibranchiata. 
Genus CiLiC^OPSls, Hansen. 
CiLic^oPsis dakini, sp. n. (PL 2. figs. 2.5-29 ; PI. 3. fig. 3-4.) 
Locality. Woody Island, Easter Group, one adult male, 13 mm. long, 
mm. broad. 
Description. The single specimeu of this new S[)ecies, a male, measures 
13 mm. in length and 9 mm. in breadth, and is thus one and a half times as 
long as broad. The body is strongly convex in dorsal view and without 
granulations or tubercles. The posterior margins of all the thoracic somites, 
the lateral margins of the body, the uropods, and the abdomen are fringed 
with short, thick hairs, the general appearance of which can be seen from 
PI. 3. tig. 34. Similar hairs are scattered over the dorsal surface of the 
abdomen, especially on the two large bosses. The distinguishing features of 
the species are to be found in the abdomen and uropods. The abdomen 
shows three proximal segments separated off from the large terminal telsonic 
somite ; the sutures separating the first two abdominal somites not complete 
in the mid-dorsal line. The posterior margin of the third abdominal somite 
is considerably and broadly produced in the raid-dorsal line, but does not 
form a process of any kind. The terminal abdominal somite bears two 
relatively enormous mammiform bosses. The posterior margin is evenly 
rounded, and shows the merest trace of a median process separated by shallow 
notches from the rest of the margin. The uropods consist of a massive basal 
joint and a long, narrow, terminal joint. The basal joint, I take it, represents 
the fused basipodite and endopodite, and the long terminal joint the exopod. 
The figures which I give of the epistome, the antennule, antenna, second 
and eiohth thoracic limbs will suffice to show the general features of these 
