228 
Aliens for Tiden bekjendte Udbredningsfelt er her- 
efter det ostlige Afhaeld mod Nordhavets store Dyb fra 
den 62de til op mod den 77de Bredegrad. 
Gen. 2. A Egina, Kroyer, 1843. 
Nat. Tidsskrift 1 R. Bd. 4. 
74. TEgina spinifera, Bell. 
(PI. XVIII, Fig. r>, a — c, %). 
Oaprella spinifera, Bell, i Appendix to Belcher’s last of Arct. Voy., pg. 
407, Tab. 35, Fig. 2, 1855. 
Ai.ejina spinosissima, Stimpson, Marine Invertebrata of Grand Mahan, 
pg. 45, 1857. 
eXgina spinosissima , G. 0 Sars, Prodromus descript. Crust. & Pycnog., 
No. 135. 
Artseharacteristik. Legemet forlgenget og smalt, oventil 
bevmbnet med en Del regelmsessigt ordnede tilspidsede Pigge, 
hvoraf de stprste danner en dobbelt Bad langs efter Byggen, 
3 — 4 Par paa hvert Segment, naar undtages de 2 sidste. 
Hovedet oventil med 2 parvis ordnede Pigge. Ved Basis 
af 2det Pod par og de 2 Par Gjelleblade til liver Side en 
staerk lateral Pig. 0inene saa, runde. lste Par Folere 
naesten af Logemets Lsengde, med Skaftets sidste Led ken- 
gere end lste, Svoben noget kortere end Skaftet; 2det Par 
sierdeles smaa og tynde, meget kortere end lste Pars Skaft 
og kun begat med korte Haar. 2det Podpar kraftigt ud- 
viklet, af lignende Porm hos begge Kjon, Haanden aflang, 
samiuentrykt, med 3 lancetformige Plige i den bagre Kant, 
begramdsende 2 vinkelformige Indsnit; Spidsen af Haanden 
over Endekloens Fieste udtrnkket i et skarpt Hjorne. Han- 
nen noget mere langstrakt end Hunnen og med mindre 
skarpt udpneget Pigbevaebning. Legemet gjennemsigtigt, 
mod morkere Shatteringer. Laengden indtil 38 w ’". 
Findesteder. Stat. 48, 336. 
Bemserkninger. Den af Bell i Belcher’s Reise be- 
skrevne Caprella spinifera er utvivlsomt identisk med nter- 
vaerende Art; ligeledes er den noget senere af Stimpson 
anforte JEgina spinosissima sannne Art. Derimod er Boock’s 
jEgina echinata aabenbart forskjellig baade ved Legemets 
Bevmbning og 2det Podpars Bygning. 
Beskrivelse af Hunnen. Legemet er (se PI. XVIII, 
Pig. 5) smalt og langstrakt, n tester! cylindriskt og oventil 
Hence, the tract throughout which the species is at 
present known to occur, comprises the eastern slope of the 
sea-bed, shelving down toward the great deeps of the 
Northern Ocean, — from the 62nd to well-nigh the 77 th 
parallel of latitude. 
Gen. 2. AEgina, Kroyer, 1843. 
Nat. Tidsskrift, 1 R., Bd. 
74. /Egina spinifera, Bell. 
(PI. XVIII, tig. 5, a — c, x). 
Caprella spinifera, Bell, in the Appendix to Belcher’s last Arctic Voyage, 
p. 407, PI. 35, tig. 2, 1855. 
JEgina spinosissima, Stimpson, Marine Invertebrata of Grand Manan, 
p. 45, 1857, 
/Kjiv.a spinosissima, G. 0. Sars, Prodromus descript. Crust. & Pycnog., 
No. 135. 
V 
Specific Character. Body elongate and slender, 
armed above with a number of acute spikes in regular ar- 
rangement, of which the largest constitute a double series 
disposed along the back, — 3 or f pairs on every segment, 
except the 2 last ones. Head, above, bearing 2 spikes, ar- 
ranged as a. pair. At base of 2nd pair of legs and the 2 
pairs of branchial scales, on either side a strong lateral 
spike. Eyes small, round. First pair of antennae attaining 
well-nigh length of body, with last joint of peduncle longer 
than 1st, flagellum somewhat shorter than peduncle; 2 nd pair 
exceedingly small and slender, much shorter than peduncle 
of 1st, and clothed merely with short hairs. Second pair 
of legs powerfully developed, of a similar form in both 
sexes, hand oblong, compressed, with 3 lanceolate lappets 
on posterior margin, marking off 2 angular incisions;, 
point of hand above attachment of terminal claw produced 
to a sharp corner. Male somewhat more elongate than 
female, and with armature of spikes loss prominently de- 
veloped. Body translucent, relieved with darker shadings. 
Length reaching 38’™. 
Locality. — Stats. 48, 336. 
Remarks. — The form described as Caprella spinifera 
by Bell, in Belcher’s Voyage, is unquestionably identical 
with the present species; moreover, this also applies to 
CEgina spinosissima, recorded somewhat later by Stimpson- 
On the other hand, Boeck’s /Egina echinata differs obvi- 
ously alike in the armature of the body and the structure 
of the 2nd pair of legs. 
Description of the Female. — The body (see PI- 
XVIII, fig. 5) is slender and elongate, almost cylindric, 
