CRUSTACEA — AMPHIPODA. 
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fore -feet : 0. Eschrichtii, from Greenland, 4'" long. Stegocepha1/as ; 
eyes apparently wanting, head very large, almost concealed by the 
large shield-formed epimera, which also covers the legs ; upper antennee, 
with a very small jointless whip-like appendage ; the mandibles with 
very short jointless palpi ; feet simple : St. injiatus, from Greenland, 
1" long. Phoxus ; head very large, anteriorly produced and pointed ; 
antennae on its under side, the two pairs standing one behind the other ; 
both have a thick pedicel ; the mandibles have very long palpi ; the 
two anterior feet formed for grasping : Ph. Ilolbolii and plumosus. 
Pontoporeia ; the first pair of feet with claws, the third pair grasping ; 
the seventh with a shield- shaped dilated first joint ; epimera large : P. 
femorata, from Greenland. Pardalisca ; the fourth joint forming a 
hand on the first and second pairs of legs, the fifth and sixth a claw, yet 
so that the sixth joint is elliptical and spinous at the margin ; epimera 
very small : P. cuspidata, from Greenland. Promedeia ; the feet of the 
second pair small, no claw-like hand, but on the third and fourth pairs 
the two terminal joints unite into a long claw, which forms, with the 
third and fourth, a grasping hand ; epimera short, the fourth, fifth, and 
sixth pairs of the abdominal members formed for leaping : P. fasciata, 
from Greenland. Ampelisca, like Amphitoe ; the second pair of feet 
simple, the third and fourth pairs have a hand, the palm of which is 
formed from the third, the fingers from the fourth, fifth, and sixth 
joints : A. Eschrichtii, from Greenland. Photis ; the first two pairs of 
feet have a claw-shaped hand, the fifth is curved backwards, standing 
reversed, with rudimentary claw-joint ; the epimera very large : Ph. 
Reinhardi, from Greenland. (Ediceros ; forehead elongated to a more 
or less pointed or blunt proboscis, which always swells into a transparent 
reddish yellow knob ; eyes apparently wanting ; the two anterior pairs of 
feet have a large claw-shaped hand, the seventh pair very long and thin : 
(E. saginatus, not rare in the Greenland Seas, also on the north coast of 
Norway. Lafystius ; head depressed, terminating in a proboscis ; the two 
short, strong, fusiform pairs of antennse, articulated, one behind the other, 
under the proboscis ; the eyes on the upper surface of the head ; the first 
pair of feet very slender, the hand linear, the second short and strong, 
with the hand quadrate, the rest strong-clawed ; epimera of middling 
size ; L. sturionis, in great numbers under the pectoral fins of the stur- 
geon, also on the Squal. galeus ; the only parasitic Amphipod yet 
known. 
The new species of the known genus are ; — Leucothoe clypeata, from 
Greenland ; L. glacialis, from Spitzbergen ; Gammorus dentatus, 
from Greenland ; Aoanthonotus injiatus, from Spitzbergen and Green- 
land ; Ischyroceros anguipes and latipes, from Greenland ; Podocerus 
Leachii, living in a cuticular tube -like Cerapus. The author remarks, 
that with regard to the form of the second pair of feet, the female is a 
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