360 THE REY. 't RB. Rk. STEBBING ON 
the sides angled. ‘The side-plates of the person have no acute 
points except that which forms the boundary of the emargination 
in the large fourth pair. The fifth pair are bilobed and not pro- 
duced backwards as in the congeneric species. 
The eyes have numerous small components. The flagellum of 
the first antenne shows fifteen joints, that of the second twenty- 
nine, in each case the first joint being much the longest, the 
second flagellum about a fifth of its length longer than the first. 
The mandibles and maxille are in: close agreement with those 
described by Chevreux, but the maxillipeds differ by the greater 
length of both the inner and the outer plates, the latter being 
nearly as long as the palp; a faint transverse line gives them the 
appearance of being jointed. 
The gnathopods, perzeopods, and uropods also differ but little - 
from those of the companion species, but the second joint of the 
first gnathopod is here sinuous, not straight, and the second 
joint of the third perzeopod is here broader, with the hind margin 
convex. 
The specimen, a female with a few large ova, measured about 
9 mm., in near agreement with Dr. Cunningham’s specimen, 
4 lines long, but much less than the specimen of P. integricauda, 
described by Chevreux as 15 mm. in length. The colour as 
preserved was marbled red. 
Locality. Whales Bay, Falkland Islands, May 17, 1910. 
Cunningham states that his specimen was dredged off Elizabeth 
Island in February 1867. 
Panoplea joubini Chevreux, 1912, strikingly distinguished 
from the present species by numerous spiniform processes, 
curiously resembles it in the unemarginate upper lip, long plates 
of the maxillipeds, emarginate telson, and in the gnathopods. 
Fam. Gi DICEROTID &. 
1906. @dicerotide Stebbing, Das Tierreich, vol. xxi. p. 235. 
Gen. MonocuLopsis Sais. 
1892. Monoculopsis Sars, Crust. Norway, vol. i. p. 310. 
In many respects this genus agrees with J/onoculodes Stimpson. 
Distinguishing features are the considerable size of the fourth 
and fifth side-plates, the relatively greater length of the third 
joint of the peduncle in the first antenne, and the somewhat 
tapering form of the long sixth joint in the second gnathopods. 
Monocuuorsis VALLENTINI Stebbing. (Pls. VI. & VII.) 
Abstract P. Z.S. 1914, p. 30. (April 28.) 
From Monoculopsis longicornis (Boeck), the type of the genus, 
the present species is distinguished chiefly by characters of the 
gnathopods. In the first pair the process of the wrist or fifth 
