85 
Forekomst og Udbredning. Af deu her omhandlode 
meget clistincte Art blev under Expeditionens sidste Togt 
' 11 Exemplarer optagne fra et Dyb af 190 Fame om- 
Oeut midt imellem Beeren Eiland og Finmarken (Stat. 290). 
( 'd nylig at gjennemgaa det paa mine forskjellige Iteiser 
indsaiiilede Materiale af Tanaider, finder jeg ogsaa et Par 
xeraplarer af samme Art fra vor nordlige Kvst (Hammer- 
fest). 
Bens for Tiden bekjendte Udbredning synes saaledes 
a f indskrsenke sig til Havet omkring Norges nordlige Kyster 
°g Beeren Eiland. 
Trib. 2. Flabellifera. 
Bemserkninger. Under denne Tribus henfprer jeg 
alle de Isopoder, bos hvem de bagerste Par Buglemmer 
sauunen med sidste Segment danner en mere eller mindre 
tydelig Halevifte. Jeg bar fundet, at disse Former ogsaa 
1 Heie andre Henseender frembyder Overensstemmelser ind - 
J l'des, og derfor fortjener at sammenfattes sorn en sasregen 
storre Afdeling af Isopoderne. Folgende Familier borer 
lerben: Anthuriibe. Anceidae, Cymotboidm (inel. rEgidse & 
dolanidaj), Serolidse, Sphseromidse (incl. Limnoriidse). 
Fain. Anceidse. 
Ben. Ancens, Risso. 1816. 
Crustaees de Nice. 
!7. Anceus stygius, G-. 0. Sars. 
(PI VIII, Fig. 1—22). 
lCews st yaius, Gr. 0. Sars, Prodromus desciptionis Onist. etc., No. (k>. 
Artscharaeteristik. d" Legemet af aflang Form, 3 
au ge lmngere end bredt, fortil noget afsmalnende, med 
1 deles baarde, piggede Integunienter. Uovedet mindre 
s *dvanligt, mesten pentagonalt, til liver Side forsynet 
s Gl en i Midten afbrudt tandet Kjol. Be frie Forkrops- 
®gmenter med grovt tandede Epimerer; de bagre Side- 
1J0rner Paa de 3 sidste udtrukne til skjievt udadrettede 
tandede Fortsatser ; mestsidste Segment storst, oventil 
Occurrence and Distribution. — Of the very dis- 
tinctly characterized species described above, a number of 
specimens were taken, on the last cruise of the Expedition, 
at a depth of 190 fathoms, about midway between Beeren 
Eiland and Finmark (Stat. 290). Lately, on reviewing the 
material comprising the Tanaid group collected on my various 
exploratory excursions, I lighted on a few specimens of the 
species from the north coast of the country (Hammerfest). 
The distribution of this form is therefore, apparently, 
at present confined to the sea, off the northern shores of 
Norway and that surrounding Beeren Eiland. 
Trib. 2. Flabellifera. 
Remarks. — To this tribe I refer all Isopods in 
which the posterior pair of abdominal limbs, along with the 
last segment, constitute a more or less distinct caudal fan. 
I have found that the said forms also present agreement 
in several other respects, and hence afford warrantable 
grounds for classing them in a special, comprehensive section 
of the Isopods. The following families belong to this sec- 
tion: — The Anthuridae, Aueeidse, Cymothoidae (including 
the gEgidm and the Cirolankbe), Serolidae, Sphaeromidae 
(including the Limnoriidae). 
Fain. Anceidee. 
Gen. Anceus, Risso, 1816. 
Crustacea do Nice. 
17. Anceus stygius, G. 0. Sars. 
(PI. VIII, figs. 1—22). 
Anceus stygius, G. 0. Sars. Prodromus descriptionis Crust, etc., No. 65. 
Specific Character. — d" Body oblong in form, 3 
times longer than broad, forward somewhat tapering, with 
exceedingly hard, spiky integuments. Cephalic segment 
smaller than usual, almost pentagonal, furnished on either 
side with a dentate keel, disrupted in the middle. Free 
segments of anterior division with coarsely dentate epimera; 
posterior lateral corners on last 3 drawn out to oblique, 
exteriorly directed, slender, toothed projections; penultimate 
