BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 11. N:o 9. 74 
side a row of 8—10 flat, compressed teeth; towards the mouth, 
on the under-side, there is another row of smaller teeth or 
spines, running parallel with the lateral margins of the head. 
The first pair of antenne consist of three joints, the last 
being the longest; they are straight, shorter than the head 
(15:22). 
The mandibles ere small, without palp. The first pair of 
maxille well developed, normal; the second pair reduced. The 
maxillipeds consist of a broad, median projection and two lateral 
lamine, strongly serrated at the interior margins. 
The "segments of the pereion are high, inflated; the first 
and second are coalesced into one, longer than the following 
segment. They show all a sharp median keel along the dorsal 
side with two spine-like prominences on each segment (even 
on the coaleseed first and second). This keel continues on 
the pleon and the urus, where it ends on the last ural seg- 
ment. Along the anterior and posterior margins of the coale- 
sced first and second segments there runs downwards a row of 
small tubercles; on each of the following pereional segments 
there is also such a row, but only along the posterior margin. 
The last pereional segment is longer than the preceding. No 
trace of epimerals is to be seen. 
The first pair of peretopoda are very short, scarcely a fifth 
of the length of the third pair. The second pair are a little 
longer; they equal a fourth of the third pair. Both pairs have 
the metacarpi a little longer than the carpal processes. The 
fifth pair are twice as long as the seventh, and a third 
longer than the fourth pair. All legs are denticulated along the 
inner(?) side. Branchial sacks at the base of the fourth to 
sixth pair. 
The pleon and urus together are longer than the five first. 
pereional segments. The first segment of the pleon is the 
longest, longer than the last pereional segment (7: 5). 
The last segment of the urus is keeled. The outer ramus 
of the uropoda is as long as the inner coalesced one. The 
peduncle of the last pair of uropoda is almost thrice as long 
the outer ramus, narrower than the length of the outer 
ramus. 
Colour. Almost transparent. 
Length. 46 to 103 m m. 
Hab. Indian Ocean, South Alantic(?). 
