ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 551 
spines, as shown in the drawing (fig. 21); the outer ramus is considerably shorter than 
the inner, and the spiniform seta at the outer angle of the second basal joint is remark- 
ably stout. The next three pairs have both rami also three-jointed, and are of 
normal form. 
In the fifth pair, which were somewhat imperfect, the basal joint was bilobed and 
moderately expanded ; the end joint, which is of a narrow ovate outline, is about three 
times longer than broad, but, being imperfect, its dimensions could not be accurately 
made out (see fig. 22). 
The specimen—a female-—represented by the drawing (fig. 16) measured 0°88 mm. 
in length. It agrees so closely in size and form and in the structure of its various 
appendages with the description and drawing of Psamathe longicauda given by 
G. O. Sars in the work referred to above, that I have no hesitation in ascribing it to 
the same species. . 
The distribution of Psamathe longicauda is apparently extensive, for in addition 
to the Mediterranean records by PuiLiprr and Cuavs, it also belongs to the Copepod 
fauna of Britain and Norway. It has also been reported from Franz Josef Land as 
well as from the Black Sea. Its occurrence at the Scotsa Station 27 extends its 
distribution to the south of the Cape Verde Islands. 
Psamathe fucicola, new species. (Pl. VI. figs. 12-19.) 
Female.—The female of this species has a general resemblance to Psamathe 
longicauda, Philippi, but is rather smaller. The length of the specimen represented by 
the drawings is 0°75 mm. 
Antennules moderately stout and composed of nine joints; second joint tolerably 
large, and fully one and a half times longer than the next; the fifth, sixth, and seventh 
very small; the last two joints are slender, but rather longer than those immediately 
preceding (fig. 12). 
The antennz, mouth organs, and swimming feet are nearly as in Psamathe 
_longicauda. 
In the fifth pair the second joint is about three times longer than broad; both the 
lateral margins are fringed with minute bristles; a small spiniform seta also springs 
from near the distal end of the inner margin, and another from the apex of the joint 
(fig. 18). The caudal rami are short and broad (fig. 19.) 
Habitat.— Found on floating seaweed—“ Gulf-weed ”—collected between the Cape 
Verde Islands and the Azores in June 1904; Station 538, 32° 11’ N., 34° 10’ W. 
Remarks.—The Harpactid recorded above has a close resemblance to Psamathe 
longicauda, Philippi, and may be mistaken for that species. It is, however, rather 
smaller; the proportional lengths of the joints of the antennules are somewhat different ; 
the thoracic legs are rather more slender, and the armature of the fifth pair, especially, 
ditiers distinctly from the species referred to, 
