156 



det kænde, at disse kortere JEggestokke ikke vare fuldt 

 udviklede. De ere bundne til Septavæggen ved et over- 

 Qiaade lust. yderst fint Bindevæv, der som en baandformet 

 Membran følger den, Tab. XVIII, Fig. 9 a. Fra denne 

 Membran udgaa stilkede, navleformede Kapsler, en paa 

 hver Side. Tab. XVIII, Fig. 7/, 9 6, og i enhver saadan 

 Kapsel udvikles der et Æg, Tab. XVIII, Fig. 9 c. 



Man ser, at Æggestokkene her ere meget forskjellige 

 fra dem, som findes hos Fenja mirabilis. hvor de ikke af- 

 vige synderligt fra Æggestokkarakteren hos Actiniderne i 

 Almindelighed. imedens de hos Ægir frigidus nærme sig 

 overmaade meget den Form, der er gjennemgaaende for 

 Alcyoniderne. 



Testiklerne ligge endnu længere ud fra Spiserør og 

 Tarm og tåge deres Begyndelse et Stykke bagenfor Mund- 

 skiven. bagenfor baade Æggestokke <>g Mesenterialfilamenter. 

 De ere byggede paa samme Vis som Actinidernes i Almin- 

 delighed og slynge sig bagover i samme Længde som Ægge- 

 stokkene, Tab. XVIII, Fig. 10. Testikkelfolliklerne ere 

 temmelig store og indeholde runde Celler med særdeles 

 stor Kjerne; i disse Celler udvikle Spermatozoerne sig. 

 Hos det imdersogte Exemplar ere Spermatozoerne kun 

 lidet udviklede og vise sig som yderst smaa. runde, glin- 

 sende Molekyler. 



Findested. 



Station 124. Et Par Exemplarer. hvoraf det ene 

 var stærkt medtaget af Skraben. 



Station 200. Flere Exemplarer, men som alle vare 

 mere eller mindre beskadigede, idet en stor Del af Krops- 

 huden var revet bort, saa at kun Mundskiven, Tentakler, 

 samt Spiserør og Tarm med paahængende Septa vare tjen- 

 lige til Undersogelse. Det er muligt, at Dyret borer sig 

 med den bagre Ende ned i Sandet, og at derfor Skraben, 

 idet den tager det med sig. river Hiiddækket istykker. 



Artskarakter. 



Legemet cylindrisk, 30""" langt, 8 — 10 m "' bredt i tien 

 forreste og 4 — 5'™ bredt i den bagerste Ende, der er for- 

 s\ net med en rund Anus. Kroppens Overflade har et 

 tyndt, slimet, skedeformet Overtræk, samt 12 Ribber, imellem 

 hvilke fordybede Længdefelter, hvori spredte, yderst smaa 

 Suge vorter; den forreste Del nogen. Mundskiven bredere 

 end Kroppens forreste Rand, foldet, lidt fordybet mod den 

 aflange Mundaabning. 12 temmelig korte, tykke, retraktile 

 Tentakler, staaende i en Række. Farven: Skeden er dyb, 

 skjøn kastaniebrun, spillende lidt i det Violette. Krop- 

 pens Hud laxerød. Tentaklerne intens karmosinrøde. Mund- 

 skiven lidt bienere. 



Hvad nu disse mærkelige Dyrs systematiske Stilling 

 angaar, saa maa jeg tilstaa, at jeg har været i stor 



intestine, but it niay be, that those short ovaries are not 

 fully developed. They are attached to the septal walls by 

 an extremely loose, very delicate eonnective-tissue, which as 

 a tape-like membrane accompanies them (Pl. XVIII. fig. 

 9 a). From this membrane. pedunculated. navel-shaped 

 capsules issue, one on eaeh side (Pl. XVIII. fig. 1 f, 9 b), 

 and in each of these capsules an ovum is developed (Pl. 

 XVIII, fig. 9 c). 



We see that the ovaries here are different from those 

 found in Fenja mirabilis, where they do not differ materially 

 from the ovarian character of the Actinida in general; 

 whilst in Ægir frigidus they greatly approach the form 

 that is general in the Aleyonida. 



The testicles lie still farther from the gullet-tube aud 

 intestine and have their origin a little way behind the 

 oral dise. behind both the ovaries and mesenterial rila- 

 ments. They are formed in the same manner as in the 

 Actinida usually. and twine backwards for the same length 

 as the ovaries i Pl. XVIII. fig. 10). The follicles of the 

 testicles are pretty large, and contain round cells with a 

 particularly large nucleus; the spermatozoa develope them- 

 selves in those cells. In the specimen examined the sper- 

 matozoa are but slightly developed. and appear as extre- 

 mely small round shilling molecules. 



Habitat. 



Station No. 124. A couple of specimens, of which 

 one was lunch injured by the dredge. 



Station No. 200. Several specimens. but all of them 

 more or less injured. iuasniuch as a large part of the 

 body-integument is torn away: so that only the oral dise 

 and tentacles. also the gullet-tube and intestine with attached 

 septa, are serviceable for investigation. It is possible 

 that the animal bores itself into the sand with its posterior 

 extremity, and that the dredge. therefore, as it dragged it 

 along, tore the integumental covering in pieces. 



Specific characteristies. 



Tlie lindy cylindrical, 30""" in length, 8—10""" in 

 breadth at the anterior extremity. and 4—5""" in breadth 

 at the posterior extremity, which is furnished with a round 

 anus. The exterior surface of the body, has a thin. inucous 

 vaginal covering, also 12 ribs, between which depressed 

 longitudinal belts in which scattered. extremely small, 

 suckers appear. The anterior part bare. The oral dise 

 broader than the anterior margin of the u ody, folded, and 

 a little depressed towards the oblong oral aperture. 12 

 rather short. thick, retractile tentacles, situated in a series. 

 The colour. The sheath has a deep, beautiful chestnut 

 brown colour with a violet play. The integument of the 

 body salmon-red. The tentacles intense crimson-red. The 

 oral dise somewhat paler in colour. 



In respect of the systematic position of those re- 

 markable animals, I must confess, that I have been in 



