116 
Gen. 2. Synidotea, Harger. 1878. 
Amer. Journal of Science III, Vol. XV. 
Slsegtscharacteristik. Legemet af mere eller mindre 
nnderssetsig Form, uden skarp Begrsendsning mellem For- 
og Bagkrop. Epimererne afrundede, ikke begraendsede fra 
Segmenterne. Hovedet udeu laterale TMvidningor. Bag- 
kroppen kun bestaaende af 2 oventil ufuldstamdigt adskilte 
Segmenter. 0inene tydelige, laterale. 2det Par Folere 
jnod Skaftets Led simpelt cylindriske, Svoben traadformig, 
mangeleddot. Kjaevefoddernes Palpe kun bestaaende af 3 
Led. lste Fodpar prehensilt, de ovrige simple Gangfodder. 
He valvelformige Halevedliaeng forholdsvis smaa, med en 
enkelt Endeplade. 
Bemserkninger. Denne Slaegt er ferst opstillet af 
Harger og her utvivlsomt opretholdes. Characteristik er 
den compaete Kropsform, de oventil ikke fra Segmenterne 
begraendsede afrundede Epimerer og Bagkroppens staerke 
Consolidation. Foruden den nedenfor naermere omtalte Form 
borer herhen den af Kroyer beskrevne Motea noduloxa, som 
ogsaa erholdtes under vor Expedition. Begge disse Arter 
er udpraeget arktiske i sin Forekomst og slutter sig natur- 
ligt sammen til en distinct Slaegtstype. 
25. Synidotea bicuspida, (Owen). 
(PI. X, Fig. 24 — 2 fp. 
Motea bicuspida , Owen, Crustacea of the “Blossom" pg. 92, PI. XXVII, 
Fig. 0 (in fide Harger). 
Synidotea bicuspida, Harger, Report on the marine Isopoda of Xew 
England pg. 352. 
Synidotea incisa, Gr. 0. Sars, Crustacea et Pycnogonida nova etc., 
No. 8. 
Artscharacteristik. Legemet af kort og undorsaetsig 
Form, aflangt ovalt, neppe dobbelt saa langt som bredt, 
med hoit kvadvet Byg og concentrisk rynket Overtlade. 
Hovedet bredt, med i Midten indskaaret Panderand og 
vinklede Sidohjomer. Forkropssegmenternes Sidedele eller 
Epimerer bredt afrundede og horizontalt udstaaende. Bag- 
kroppen kort, triangular, i Spidsen forsynet med et tyde- 
ligt Indsnit begrsendset af 2 tilspidsedc Fremspring. 0inene 
store og fremstaaende med morkt Pigment. 2det Par Fplere 
af Legemets halve Lrnngde, med Svoben lsengere end Skaftet 
og sammensat af omtrent 14 Led. Farven morkt chocolade- 
brun med rodbrune ShatteringeiC Lsengden 14 ram . 
Gen. 2. S.ynidotea, Harger. 1878. 
Amer. Journal of Science III, Vol. XV. 
Generic Character. — - Body more or less thickset 
in form, without any sharply defined instriction between 
the anterior and posterior divisions. Epimera rounded 
off, not defined from segments. Head without lateral dil- 
atations. Posterior division ot body consisting of only 
2 segments, imperfectly separated above. Eyes distinct, 
lateral. Second pair of antennae with joints of peduncle 
simple, cylindric; flagellum filiform, multi-articulate. Palp 
of maxillipeds composed of only 3 joints. First pair of 
legs prehensile, the rest simple pereiopoda. Valvular caudal 
appendages comparatively small, with but a single terminal 
plate. 
Remarks. — This genus was first instituted by Harger, 
and should unquestionably be maintained. Conspicuous, 
as characteristic features, are the compact form of body, 
the rounded epimera, not separated above from the seg- 
ments, and the remarkably consolidated structure of the 
posterior division of the body. Exclusive of the form 
treated of more in detail below, to this genus also belongs 
Idotea nodulosa, described by Kroyer, likewise taken on the 
Norwegian Expedition. Both of these species are promi- 
nently Arctic in occurrence, and naturally approximate as 
a distinct generic type. 
25. Synidotea bicuspida, (Owen). 
(PI. X, figs. 24—26). 
Motea bicuspida, Owen, Crustacea of the “Blossom” p. 92, PI. XXVII, 
tig. 9, (in fide Harger). 
Synidotea bicuspida, Harger, Report on the marine Isopoda of New 
England, p. 352. 
Synidotea incisa, (4. O. Sars, Crustacea et Pycnogonida nova etc., 
No. 8. 
Specific Character. — Body short and thickset in 
form, oblongo-oval, scarcely twice as long as broad, with 
an exceedingly vaulted back and the surface concentrically 
corrugated. Head broad, with frontal margin incised in 
the middle and lateral corners angular. Lateral parts, 
or epimera, broadly rounded and horizontally projecting. 
Posterior division of body short, triangular, and having 
at the point a distinct incision, bounded by 2 acute projec- 
tions. Eyes large and protruding, with a dark pigment. 
Second pair of antennae half the length of body, with flag- 
ellum longer than peduncle, and composed of about 14 
joints. Colour a dark chocolate-brown, with reddishbrown 
shadings. Length 1 4’""’. 
