12 SLADEN TRUST EXPEDITIONS TO ABROLHOS ISLANDS. 
Family AMPEITHOIDiE. 
Genus Grubia, Czerniavshj. 
9. Grubia setosa {Haswell). (PI. 2. figs. 21-24.) 
Amjjhitho'e setosa, Haswell, 1880 (1), p. 270. 
Grubia setosa, Stebbing, 1906, p. 644. 
Localities. Four males and four females, up to 15 mm. in length, from 
Sandy Island, Wooded Island, and Pioeon Island. (Shore collecting in each 
case.) 
Distribution. Sidney Harbour and Botany Bay, Now South Wales 
(Haswell & Chilton). 
Remarks. Haswell's original description is short and unaccomijanied by 
figures, but the present specimens are in agreement with it. Chilton, 
who examined specimens from Sydney Harbour which he referred to 
this species, stated that the first antenna possessed a small accessory 
appendage. The present specimens, or at least such of them as still 
retain the first antenna, possess a small two-jointed accessory flagellum on 
that appendage, barely longer than the first joint of the main flagellum. 
The species is therefore a true Grubia, in which genus Stebbing has already 
placed it. 
The species is mainly distinguished by the form of the first and second 
gnathopods in both sexes, and especially by those of the male. I figure 
these appendages herewith. They are similar in the male and female, 
but in the former they are more massive and are densely fringed with long, 
■delicate, plumose setse, especiallj' on the second, carpal, and propodal joints. 
The palmar margin is undefined in the first gnathopod, but in the second it 
is bounded by a rather prominent tooth, on the inside margin of which is a 
strong spine. In the second gnathopod of the male the limiting tooth is 
stronger, and immediately inside it on the palm is a small excavation into 
which the nail fits. The nail in both gnathopods is provided with a closely- 
set row of blunt spines on the inside margin. The figures will serve to show 
the general form of these limbs and the proportions of the joints. 
For the rest, the species has no very marked characters. The first antennae 
■are almost as long as the whole animal, the third joint of the peduncle about 
^-^ as long as (he second, and" the flagellum composed of about 50 joints. 
The second antennae are f as long as the first. The fourth joint of the 
peduncle reaches to the distal end of the second joint of the peduncle of the 
first antenna3. The fifth joint equals the fourth in length, and the fiagellum 
has 35 joints. The lower margin of the peduncle is beset with long 
plumose hairs, particularly in the male. The inner lobe of the first n)axilla 
tears six or seven fine plumose sette. The third uropods have the peduncle 
imuch larger than the rami, with a row of seven short, blunt spines on the 
•dorsal apical margin. The inner ramus bears one spine and a number of seta2 
