228 



Artens for Tiden bekjendte Ddbredningsfelt er her- 

 efter det østlige Afhæld mod Nordhavets store Dyb fra 

 den 62de til op mod den 77de Bredegrad. 



Gen. 2. Ægina, Kroyer, 1843. 

 Nat. Tidsskrift 1 R, Bd. 4. 



74. Ægina spinifera, Bell. 



(Pl. XVIII, Fig. :., a—c, x). 



Oaprella spinifera, Bell, i Appendix to Belcher's last of Aret. Voy., pg. 



407, Tab. r., Fig. '.'. 1855. 

 Egina spinosissima, Stimpson, Marine Invertebrata of Grand Manan, 



pg. 4."., 1857. 

 Ægina spinosissima, Gr. 0. Sårs, Prodromus descript. Crust. & Pyenog., 



No. 13"). 



Artscharaeteristik. Legemet forlænget og smalt, oventil 

 bevæbnet med en Del regelmæssigt ordnede tilspidsede Pigge, 

 hvoraf de største danner en dobbelt Rad langs efter Ryggen, 

 3 — 4 Par paa hvert Segment, naar undtages de 2 sidste. 

 Hovedet oventil med 2 parvis ordnede Pigge. Ved Basis 

 af 2det Fodpar og de 2 Par Gjelleblade til hver Side en 

 stærk lateral Pig. Øinene saa, runde. Iste Par Følere 

 næsten af Legemets Længde, med Skaftets sidste Led Len- 

 gere end Iste, Svøben noget kortere end Skaftet; 2det Par 

 særdeles smaa og tvnde. meget kortere end Iste Pars Skatt 

 og kun besat med korte Haar. 2det Fodpar kraftigt ud- 

 viklet, af lignende Form hos begge Kjøn, Haanden aflang, 

 sammentrykt, med 3 lancetformige Flige i den bagre Kant. 

 begrændsende 2 vinkelformige Indsnit ; Spidsen af Haanden 

 over Endekloens Fæste udtrukket i et skarpt Hjørne. Han- 

 nen noget mere langstrakt end Hunnen og med mindre 

 skarpt udpræget Pigbevæbning. Legemet gjennemsigtigt, 

 med mørkere Shatteringer. Længden indtil 38"™. 



Findesteder. Stat, 48. 336. 



Bemærkninger. Den af Bell i Belcher's Reise be- 

 skrevne Caprella spinifera er utvivlsomt identisk med nær- 

 værende Art; ligeledes er den noget senere af Stimpson 

 anførte Ægina spinosissima samme Art. Derimod er Boeck's 

 Ægina echinata aabenbart forskjellig baade ved Legemets 

 Bevæbning og 2det Fodpars Bygning. 



Beskrivelse af Hunnen. Legemet er (se Pl. XVIII, 

 Fig. 5) smalt og langstrakt, næsten cylindriskt og oventil 



Hence, the tract throughout which the species is at 

 present known to oecur, 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 77th 

 parallel of latitude. 



Gen. 2. Ægina, Kroyer, 1843. 



Nat. Tidsskrift, I R,, Bd. 



74. Ægina spinifera, Bell. 



(Pl. XVIII, fig. 5, a—c, x). 



('up,-, lin spinifera, Bell, in the Appendix to Belcher's last Arctic Voyage, 

 1>. 407, Pl. 35, fig. 2, 1855. 



Ægina spinosissima, Stimpson, Marine Invertebrata of Grand Manan, 

 p. 45, 1857. 



Ægina spinosissima, G. 0. Sårs, Prodromus descript, Crust. & Pyenog., 



No. i:::.. 



Specific Charaeter. 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 4 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. Eves small, round. First pair of antennæ attaining 

 well-nigh length of body, with last joint of peduncle longer 

 than Ist. Hagellum somewliat shorter than peduncle; 2nd pair 

 exceedingly small and slender. much shorter than peduncle 

 of Ist, 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 cia w produced 

 to a sharp corner. Male somewhat more elongate than 

 female, and with armature of spikes less prominently de- 

 veloped. Body translucent, relieved with darker shadings. 

 Length reaching 38""". 



Locality. — Stats. 48, 336. 



Remarks. — The form described as Caprrlhi spinifera 

 by Bell, in Belcher's Voyage, is unquestionably identical 

 with the present species ; moreover, this also applies to 

 Ægina spinosissima, recorded somewhat later by Stimpson. 

 On the other hand. Boeek's Ægina ecliinata 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 Pl. 

 XVIII, fig. 5) is slender and elongate, almost cylindric, 



