ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 571 
been obtained with other interesting Crustacea in collections made by Dr Bruce in 
Franz Josef Land, and G. M. THomson records a variety (LZ. longicauda var. antarctica, 
G. M. Thom.) from New Zealand; and another species—H. robusta, Giesbrecht—is 
recorded from the Mediterranean. The form described above resembles the species last 
referred to, but appears to differ in one or two minor points, such as in the armature 
of the first and fourth pairs of thoracic legs and in the proportional lengths of the 
abdominal segments. 
Halitat.—Scotia Bay, South Orkneys, June 1903; Station 325, 60° 43’ 42” S., 
44° 38’ 33” W. 
Fam. LicHoMoLGIDz. 
Genus Lichomolgus, Thorell, 1859. 
Inchomolgus fucicola, G. 8. Brady. (PI. XII. figs. 23-26.) 
1872, Macrochetron fucicolum, Brady, Nat. Hist. Trans. Northumb. and Durham, vol. iv. p. 484, 
pl. xviii. figs. 9-18. 
1880, Lichomolgus fucicola, Brady, Mon. of the Free and Semi-parasitic Copepoda of the British Islands, 
vol. i. p. 41, pl. Ixxxv. figs. 1-11. 
A few specimens of this species were obtained from some floating seaweed 
collected by the s.y. Scotia in July 1904; Station 539, 33° 53’ N., 32° 27’ W. 
The roughly serrated margin of the strongly curved claws—terminal claws—with 
which the female antennz are armed, seems to be characteristic of this Lichomolqus 
(see fig. 24). 
The antennules are composed of seven joints, the third joint being the smallest (fig. 
23). ‘The inner branch of the fourth pair of thoracic legs is short and biarticulate, the 
_ two joints being subequal, and the end one furnished with two terminal setz. 
The fifth pair are uniarticulate, tolerably elongated, and narrow (fig. 25). Caudal 
rami about as long as the last abdominal segment. 
The distribution of Lichomolgus fucicola appears to be extensive. It has been 
recorded from several British localities, usually from the laminarian zone, where it lives 
apparently about the roots and among the fronds of the seaweeds, such as Laminamea. 
This is one of the more easily identified members of the genus. 
Genus Pseudanthessius, Claus, 1889. 
Pseudanthessius fucicolus, new species. (Pl. XII. figs. 1-13.) 
Description of the Female.—In its general appearance, the female of this species 
resembles Lichomolgus hirsutipes from the Firth-of Forth, and, but for the difference 
in the structure of the fourth pair of swimming feet, it might be referred to that 
genus. 
The antennules, which are composed of seven joints, have the second one rather 
longer than the others, while the third is the smallest; the next four joints gradually 
