DR. W. M. TATTERSALI. : AMPHIPODA AND ISOPODA. 15 
the uropods. The body in both sexes is smooth, except for a spai'se coating 
of short fine hairs on the sides of the thorax and on the abdomen and the 
uropods. There are no granulations or small tubercles. In the male, the 
abdomen of which I have figured, the posterior mai'gin of the fourth 
abdominal somite, which is completely separated from the terminal part of 
the abdomen, is produced into two small tubercles, one on each side of the 
middle line. The terminal part of the abdomen has two large mammiform 
bosses on the dorsal surface separated by a shallow depression, each with a 
small tubercle on the highest part of the boss. The posterior margin of the 
abdomen is tridentate, a large mesial lobe separated by notches from a small 
lateral lobe on each side. The large median lobe is very much bigger than 
the lateriil lobes and almost masks them in dorsal view. The uropods are 
shorter than the median lobe of the abdominal notch, the endopod well- 
developed and as long as the exoijod, with the apex truncate ; the apex of the 
exopod is rather acute. The female differs from the male in being without 
the tubercles on the posterior margin of the fourth abdominal somite, and in 
having the bosses on the terminal portion of the abdomen less well-marked 
than in the male and without the tubercle on their highest parts. 
Haswell's types were collected at Port Denisou in Queensland, and the 
species does not appear to have been met with since. The species was 
omittel from Haswell's ' f Catalogue of Australian Crustacea,' and has been 
lost sight of since the original description appeared in 1880. 
CfMODOCE PELSAETI, sp. n. (PI. 2. figs. 30-33 ; PI. 3. fig. 36.) 
Localities. Sandy Island, two males, 9-12 mm. Pigeon Island, one male, 
8 mm. ; one female, 6 mm. ; and six juv. 
Description of the Male. The sides of the thoracic somites and the whole 
of the abdomen and uropods are fringed with rather long hairs. Similar but 
much shorter hairs are sparsely scattered over the dorsal surface of the 
thorax. The thoracic somites have a double row of small round tubercles 
extending as a band right across the posterior portion. These tubercles are 
rather obscure on the anterior somites, but become successively more clearly 
marked on the posterior ones. They are more clearly defined in the larger 
specimens. The abdomen has an ornamentation of granules and tubercles, 
as shown in PI. 3. fig. 36, which is taken from a male specimen, 9 mm. in 
length. The whole of the abdomen and dorsal surface of the uropods is 
finely granulose, and scattered ainong the small granulations are larger 
rounded tubercles and a few still larger and pointed tubercles. The posterior 
margin of the fourth abdominal somite, w hich is complete right across the 
dorsal surface, is produced into two prominent pointed tubercles, one on each 
side of the middle line. Each of these tubercles bears a clump of long hairs 
immediately in front. The remainder of the anterior portion of the abdomen 
