1. Nebalia bipes (Fabr). 
(Tab. I, Fig. 1—8; Tab. IT og IM; Tab. IV, Fig. 1—8; Tab. V). 
Cancer bipes, O Fabricius, Fauna Grénlandica n. 223. 
Cancer gamarellus bipes, Herbst, Geschichte der Krabben ete. 
Ui, Ul. 
Nebalia Herbstii, Leach, Zool. miscell. I, p. 100. 
— Milne— Edwards, Hist. nat. des Crustacés. III, 
p. 356. 
Nebalia Montagui, Thompson, Zool. Researches. 
Nebalia bipes, Kroyer, Gronlands Amphipoder, p. 91. 
— — Naturh. Tidsskr. 2den Rekke, I, p. 486. 
— Gaimard’s Voyage en Scandinavie, Pl. 40, Fig. 2, 
a—x. 
= — Baird, British Entomostraca. 
Nebalia Geoffroyi, Milne—Edwards, Ann. d. sc. nat. 1828. 
— M—Edwards, Hist. nat. d. Crustacés. II. 
_ Claus, Zeitschr. f. wissensch. Zoologie, XXII, 
p- 328, Tab. XXV. 
— ~, Glaus, Untersuchungen zur Erforschung der 
genealogischen Grundlage des Crustaceen- 
: systems, p. 24, Tab. XV, Fig. 4—6. 
Nebalia bipes, A. S. Packard, A Monograph of the Phyllopod 
Crustacea of North America, with Remarks on 
the Order Phyllocarida, p. 432, Pl. XXXVI— 
Rev, |: 
Artscharacter. — Legemet af temmelig slank 
Form, navnlig hos Hannen. Rygskjoldet af betyde- 
lig Sterrelse, seet fra Siden hos Hunnen af oval, ” 
hos Hannen af elliptisk Form, omtrent lige hoit 
fortil som bagtil. Pandepladen jevnt tilrundet i 
Enden, uden terminal Spina. @inene vel udviklede, 
noget sammentrykte, med den ydre Del noget ud- 
videt og skjevt afrundet, Pigmentet af morkerod 
Farve. De ovre Folere hos Hunnen omtrent af For- 
kroppens Lengde, med Svoben omtrent saa lang som 
Skaftet og det lamelleformige Vedheng ovalt; hos 
Hannen betydelig sterkere forlengede, med Svoben 
mere end dobbelt saa lang som Skaftet og det 
lamelleformige Vedheng smalt elliptiskt. De nedre 
Folere hos Hunnen '/2 Gang til-saa lange som de 
evre; hos Hannen af hele Legemets Langde, med 
Svoben overordentlig tynd og forlenget. Branchial- 
feddernes Epipodit meget stor, elliptisk, med den 
nedre Lap af samme Storrelse som den ovre. Iste 
Par Svommefodder med Yderkanten af den ydre 
Gren tandet i hele sin Langde. Halegrenene hos 
Hunnen omtrent saa lange som de 2 sidste Bagkrops- 
segmenter tilsammen, hos Hannen af mere end den 
dobbelte Lengde. Farven varierende fra‘ lyst hvid- 
gult til intensiv rodbrun. Legemets Lengde indtil 
12 mm. , Re 
Bemerkninger. — Den middelhavske Form, 
N. Geoffroyi, M. Edw., hvoraf jeg har havt Exem- 
plarer til Undersogelse, tagne af min Fader ved 
Neapel, synes i ingensomhelst Henseende at skille 
sig fra vor nordiske Form, der utvivlsomt er iden- 
tisk med Fabricius’s Art. Det samme er ogsaa Til- 
feeldet med N. Herbstii Leach og N. Montagwi Thomp- 
2— G. O. Sars: Fauna Norvegix. 
1. Nebalia bipes (Fabr). 
(Pl. I, figs. 1—8: Pl. II and III; Pl. IY, figs. 1-8; Pl. V.). 
Cancer bipes, O. Fabricius, Fauna Griénlandica n, 223. 
Cancer gamarellus bipes, Herbst, Geschichte der Krabben &c. 
IT, UI. 
Nebalia Herbstii, Leach, Zool. miscell. I. p. 100. 
Milne—Edwards, Hist. nat. des Crustacés, IT. 
p. 356. 
Nebalia Montagui, Thompson, Zool. Researches. 
Nebalia bipes, Kroyer, Grénlands Amphipoder, p. 91. 
— — Naturh. Tidsskr. 2 Series, II, p. 436. 
-— — Gaimard’s Voyage en Scandinavie, Pl. 40, fig. 2, 
a—x. 
_ — Baird, British Entomostraca. . 
Nebalia Geoffroyi, Milne—Edwards, Ann. de sc. nat. 1828. 
M-Edwards, Hist. nat. d. Crustacés, III. 
Claus, Zeitschr. f. wissensch. Zoologie, XXII, 
p. 323, Pl. XXV. 
Claus, Untersuchungen zur Erforschung der 
. genealogischen Grundlage des Crustaceen- 
systems, p. 24, Pl. XV, fig. 4—6. 
Nebalia bipes, A. 8. Packard, A Monograph of the Phyllopod 
Crustacea of North America, with Remarks on 
the order Phyllocarida p. 432, Pl. XXX VI— 
XXXVI. 
Specific characters. — Body of rather slender 
form, especially in the male. Carapace of consider- 
able size, viewed laterally in female oval, in male 
elliptical in form, about the same height in front 
as behind. Frontal plate evenly rounded at the 
extremity, without terminal spina. Eyes well deve- 
loped, somewhat compressed, with the outer part 
somewhat expanded and obliquely rounded, pigment 
of dark red colour. Superior antenne in female 
about the length of the anterior division of the 
body, with the flagellum about as long as the pe- 
duncle and the lamellar appendage oval; in male 
considerably more prolonged, with the flagellum 
more than twice as long as the peduncle, and the 
lamelliform appendage narrow elliptical. Inferior 
antenne in female half again as long as the superior 
ones; in male as long as the entire body, with the 
flagellum extremely thin and prolonged. Epipodite 
of the branchial legs very large, elliptic, with the 
lower lobe of same size as the upper one. First 
pair of swimming legs dentated along the entire 
length of the exteroir edge of the outer ramus. Caudal 
rami in female about as long as the 2 last seg- 
ments of the posterior division of the body together; 
in male more than twice the length. Colour vary- 
ing from light whity-yellow to intense red-brown. 
Length of the body reaching 12 m. m. 
Remarks. — The Mediterranean form, N. Geoffroyi, 
M. Edw. of which I have had specimens for investi- 
gation, collected by my father off Naples, appears 
in no respect, whatever, to distinguish itself from 
our northern form, which is, undoubtedly, identical 
with Fabricius’s species. The same is also the case 
with N. Herbstii Leach, and N. Montagui Thompson. 
