BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 11. N:o 17. 9 
is almost as broad as the fifth, the seventh is a little nar- 
rower. The fifth segment is twice as long as the fourth, the 
sixth shorter than the fifth, the seventh shorter than the sixth. 
The epimerals are nearly rectangular, the hinder corners 
of the three last pairs are produced backwards, pointed. The 
epimerals of the fifth segment are twice as long as the ones 
of the fourth, occupying the whole length of the segment. 
The first segment of the pleon is not obtected by the 
seventh pereional segment, but is a little shorter than the 
same. The second, third and fourth segments equal each the 
first in length and are but little narrower. The fifth seg- 
ment is shorter than the next preceding. All are pointed at 
the hinder corners. 
The urus is triangular, very large, acuminated at the end; 
the anterior lateral margins are crenulated, the posterior 
denticulated, on each side carrying 5 large teeth, each of 
them again crenulated, and fringed with plumose hairs. On 
the upper side it shows a feebly marked, median keel. 
The rami of the uropoda equal in length, elongate-ellip- 
tical, acuminated, not reaching beyond the end of the urus. 
They are crenulated and fringed with plumose hairs. The 
inner ramus is a little broader than the outer, arcuated at 
the inner margin and almost straight at the outer. 
Colour. Yellow. 
Length. 13 mm. 
Hab: »Öxfjord», Northern Norway, at a depth of 100 fa- 
thoms. 
Aegiochus ventrosus is to be distinguished from Aegi- 
”ochus Nordenskiöldii by the quadrangular form of the epi- 
merals, the length of the epimerals of the fifth segment, the 
free first pleonal segment, the short, last pleonal segment 
the longer and more closely situated eyes. 
4. Rocinela Dumerilii. Lucas. 
Syn. 1845. Acherusia Dumerilii. LUCAS. Exploration scient. de V'Alge- 
rie. Zoologie. tome I. p. 7. Atl. 
des Crustacés. pl. 8 fig. 3. 
1864. Acherusia complanata. GRUBE. Die Insel Lussin und ihre 
Meeres-fauna. I. p. 76. 
