546 DR THOMAS SCOTT ON THE 
inner ramus of the first pair is considerably shorter than the outer one, and the end ~ 
joint is rather narrower than the first or second (fig. 5). 
Fifth pair lamelliform, tolerably broad, and composed of two joints; the first joint 
is produced anteriorly into a narrow appendage bearing two apical and marginal sete ; 
the second joint is provided with five or six slender bristles on the distal half of the 
outer margin and apex (fig. 7). 
Caudal rami short, ovate; a tolerably stout spine springs from a notch near the 
middle of the outer margin, and there are also one elongate and three short sete round 
the distal end of each ramus (fig. 8). | 
Halitat.—Scotia Bay, South Orkneys, obtained in siftings from some dredged 
material collected in June 1903; Station 325, 60° 43’ 42” S., 44° 38’ 33” W. 
Remarks.—The species described above may be distinguished by the peculiar 
structure of the fifth pair of thoracic legs, as well as by the form and armature of the 
caudal rami. 
Genus Paralteutha, new genus. 
Definition.—Similar to Alteutha, Baird, in its general form and in its cephalo- 
thoracic appendages, except that the inner ramus of the first pair of swimming feet 
consists of two instead of three joints; and the lateral margins of the second joint of 
the fifth pair are parallel, or nearly so, while the distal extremity of the joint is obliquely 
truncated. 
Paralteutha typica, new species. (Pl. X. figs. 16-25.) 
Female.—Body depressed, expanded laterally, as in Alteutha depressa, Baird. 
Length of the specimen represented by the drawing (fig. 16), 1°6 mm. 
Antennules nine-jointed, as in Alteutha depressa. Outer ramus of the antenne 
small and biarticulate, but the end joint is very minute. 
Mandibles with the masticatory end narrow and truncated, biting edge obscurely 
dentate. Second maxillipeds elongated, each provided with a tolerably large and 
powerfully clawed hand (fig. 20). 
First pair of thoracic legs elongated and moderately stout, inner ramus not much 
shorter than the outer, and composed of two subequal joints (fig. 21). The next three 
pairs long and slender, and furnished with long slender marginal spines (fig. 22). 
Fifth pair stout, two-jointed; the first joint is short, but the second is tolerably 
elongated, and about four times as long as broad; its margins are nearly parallel, and 
its distal extremity truncated and armed with three stout spines, the inner one being 
the largest. There are also two short spines on the inner margin, one near the middle 
of the joint, the other near its distal end. ‘he first joint is also provided with a few 
long sete, as shown in the drawing (fig. 24). 
Caudal rami short and subquadrangular in outline. A short, stout spine springs 
from a notch on the outer margin of each ramus, and there are also a few small 
apical spines. 
