Rey. A. M. Norman on new Crustacea Amphipoda. 413 
The antenne present a very unusual appearance, from their 
peculiar nakedness and smooth rounded contour; there is not 
a single spine upon any part, and the peduncles have but very 
few, minute, scarcely noticeable cilia. E%rst gnathopods having 
the wrist long and slender, gradually (but only slightly) taper- 
ing from the base to the distal extremity ; hand very narrow, 
not subchelate, no palm; finger half as long as hand, nearly 
straight, with a spine on the inner margin at half its length ; 
posterior margin of wrist and hand setose. Second gnathopods 
almost exactly like the first ; but the margin of wrist and hand 
is more sparingly setose, and the whole form rather more 
slender. Last peretopods short and stout; thigh much ex- 
panded posteally ; both wrist and hand shorter than the pre- 
ceding joint (metacarpus) ; nail strong, short, very thick at 
the base. Pleon having distal margins of first three segments 
serrate (teeth about ten); fourth, fifth, and sixth segments 
produced posteally into a single spear-like process, that of the 
fifth segment of immense size. Telson squamiform, of great 
size, equalling the three preceding segments in length. First 
uropods longer than the second, and reaching to the middle of 
the rami of the last; last uropods slightly extending beyond 
the telson, consisting of a short flattened peduncle and two 
flattened blades of equal length. Length a little more than a 
fourth of an inch. Colour reddish; antenne banded with 
brown ; eyes blood-red. 
This is a very remarkable genus, on account of the charac- 
ter of the eyes, the peculiar naked appearance of the antenna, 
and the structure of the pleon and its appendages. 
The type specimen was sent to me by Mr. Dawson, who 
dredged it, in 1865, off the Aberdeenshire coast. 
My “only specimen is mounted for the microscope, and I 
am prevented obtaining a dorsal view of the telson, which 
may or may not be cleft. 
Nicrppre, Bruzelius. 
Body rather stout ; coxee moderately deep. Antenne slender, 
the upper with secondary appendage. Mandibles dissimilar, 
furnished with three-jointed palps—the one having an accessory 
process or internal branch, the other without it. Palp of first 
maxille two-jointed. Maxillipedes having the laminz small, 
and the palp four-jointed. Both pair of gnathopods subche- 
late. Last three pairs of peretopods gradually increasing in 
length. Last wropods two-branched, both branches composed 
of one joint only. ; 
