88 



Et cieiulommeligt Udseeiule har Kolonien i den 

 Tid da Gonangierne er fuklt udviklede. Disse voxcr i 

 meget tætte Eækker langs Oversiden af Grenene og har 

 alle sin Længderetning parallel Hovedstammens. Deres 

 Længde er noget større end den vertikale Afstand mellem 

 to Grene, og de forskjellige Rækker af Gonangier kommer 

 saaledes til at dække hinanden som Tagsten, idet hver 

 Rækkes Gonangier med sin distalo Del dækker den nær- 

 mest ovenfor liggende Gren og dermed ogsaa lulspringet 

 af dens Gonangierække. 



Paa Nordh.-Exp.'s Exemplar er du Heste Gonangiers 

 Indhold tømt nd i de ydre Marsupier, og disse fremhæver 

 sig derfor som tætte Rader af smaa Kugler. der danner 

 den ovre Begra'nsning af liver enkelt Gonangierække. 



Findested. St. 322. 



Hydrallmania falcata, Lin. 



Trophosome, Hydrocaulus fynd, lioielig, spiralsiioet, 

 bærer ikke Hydrotlieker; Grenene er ofte fjærformig for- 

 grenede. Hydrotheker daskeformige, unilateralt anordnet 

 langs Grenene, men deres Munding er afvexlende rettet 

 til hoiri' og venstre. Deres Aabning w oval mod svagt 

 l)ugtet Kant. 



Gonosome. Gonangier ovale, med rund Aabning. 



Store Kolonier (15— 2U cm.) af denne Art fandtes 

 paa Here Stationer under Xordh.-Exp., men ikke alle Sta- 

 tioners Xummer tindes bevaret. 



Findested. St. 303 og 235. 



Fiini. Plumularidae. 



Hi/ihaitther spindeJforndge med traadformige Tentakler 

 i en Kreds. Hgdrotlwlxr ■■^iddende og atiordnet i en Bæklce 

 Jangs Stamme og Grene. Hydroeauhis oftest med regel- 

 mæssig fjærformig Forgrening. Xt-mutopliorer altid tilstede. 



Plumularia fragilis, Hamanu. 



(Tall. VII, Fig. 1). 



Trophosome. Kolonien fjærformig; Hydrocaulus 

 enkel, tydelig leddet; hvert Led bærer 1 Hydrocladium. 

 Disse udgaar alternerende, og hvertandet Internodium liærer 

 en Hydrothek, hvis Længde er omtrent \ 3 af Internodiets. 

 1 Nematophor tindes proximalt for hver Hydrothek, medens 

 de mellemliggende Liternodier er nogne. 



Gonosome. Gonangier ovale, næsten siddende, ofte 



med spidse Fremspring i distale Ende; de sidder i to 



Eækker langs Hovedstammen, lodret paa denne og i Hy- 

 drocladiernes Plan. 



The colony has a very peculiar appearance when tiie 

 gonangia are fully developed. The latter grow in very 

 thick rows along the upper side of the branclies. and all 

 have their long axis parallel with that of the main stem. 

 Their length is somowhat greater than the vertical distance 

 l)et\veen two branches, and the different rows of gonangia 

 thus cover one another like roof slates, the distal portion 

 of those in one row covering the next brancli above them, 

 and therefore also tlie base of its gonangia. 



In tiie N. Atlan. Exp. specimens, most of the go- 

 nangia have emptied their contents into the external mar- 

 supia, which appear in consequence like close rows of 

 little spheres, forming tlie upper border of each row of 

 igia. 



Locality. Station 322. 



Hydrallmania falcata. Lin. 



Trophosome. Hydrocaulus thin. tlexil)le. si)irally 

 twisted, does not bear hydrothecæ; the ])ranches are often 

 pinnate. Hydrothecæ bottle-siiaped, unilaterally arranged 

 along th(^ branches, but their opening is alternately to the 

 right aud left. Tiie oi)ening is oval. witli sligbtly cur- 

 viiig etliic. 



Gonosome. Gimangia oval, v.-itli round opening. 



Large colonies (15 — 20 cm.) of this species where 

 found at several stations during the N. Atlan. Exp., but 

 not all tlie numbcrs of the stations have been preserved. 



Locality. Stations 303 and 235. 



Fain. Plumularidae. 



HgdrantJis spindle-shaped, iritl/ fillform tentacles in 

 a circle. Hgdrothecce sessile and arranged in a row along 

 the stem and hrunchcs. Hgdrocauluf' generallg irifh regidar 

 pinnate ramijication. Nemnfojihores- alirags pre.^^ent. 



Plumularia fragilis. Hamaun. 



(Pl. VII. f5g. 1). 



Trophosome. Colony pinnate; hydrocaulus simple, 

 distinctly articulated, each joint bearing 1 iiydrocladium. 

 These grow alternately from ojiposite sides, and every 

 otlier internode bears 1 iiydrotheca. wiiose length is about 

 ^/s that of tiie internode. One nematophore is found on 

 the proximal side of each hydrotheca. while the intervening 

 internodes are bare. 



Gonosome. Gonangia oval, almost sessile, often with 

 sharp projections at the distal end; tliey stand in 2 rows 

 along the main stem, perpendicular to it, aud iu the plane 

 of the hvdrocladia. 



