76 



Gonosome. Gonangier udgaar fra Stolonen, og er 

 glatte, cirlcelrunde, noget fladtrykte fra Siderne, med en 

 kort Munding. 



Denne Art er tidligere fundet af G. 0. Sårs ved 

 Bodø og Lofoten, og af Storm i Trondhjemsfjorden paa et 

 Dyb af 80 — 25*) Favne. Sars's Exemplarer var, ligesoni 

 det paa Nordh.-Exp. fundne, uden Gonangier, og ovenstaa- 

 ende Beskrivelse a f disse er givet af Storm, der saa dem 

 paa enkelte af de i Trondhjemsfjorden fundne Exemplarer, 



Findested. Ukiendt. 



Fam, Sertularidae. 



Hl/dra nflu' r spindélformhie med traud/ormede Teii- 

 talder i en Kreds. Hi/drotlieJær rør- eller hægerformige, 

 altkl siddende, og i mere eller mindre intim ForlnmleJse 

 med Hydrocanlus ; denne er stadig forgrenet, og Grenene 

 oftest alternerende. 



Indcnfor denne Familie, ligesora inden Fam. Cam- 

 jjanulinidae, har Levinsen gjennemført en Slægtsinddeling 

 grundet paa Beskaffenheden af Hydrothekornes Laag. Men 

 ogsaa her maa jeg fastholde, hvad jeg udtalte tidligere, 

 nemlig at Langets og Hydrothekrandens Beskaffenhed er 

 meget gode Artsmerker, men at grunde et System paa 

 disse Karakterer vil være at tillægge dem en altfor stor 

 Betydning. 



Scivneider lader alle Familiens Arter kun danne en 

 eneste Slægt, Sertidaria, medens han dog af praktiske 

 Hensyn opstiller flere Grupper indenfor denne, og denne 

 Gruppeinddeling liaserer han i)aa Hydrothekernes Anord- 

 ning paa Grenenes Internodier, 



Jeg finder ogsaa, at Grænserne mellom de Slægter, 

 der er opstillet i de forskjellige Systemer er altfor løse, til 

 at Slægterne skal kunne blive staaende, og de forskjellige 

 Arter af Sertularider danner en fuldstændig sluttet Række. 

 Jeg deler derfor Schneiders Opfatning, at hele Familien 

 danner én Sla\gt, hvis Alter kan iiuldeles i forskjellige 

 Grupper. 



Sertularella gayi, Lamx. 



Trophosome. Hydrocaulus sammensat. Grene alter- 

 nerende, men metl uregelmæssig Afstand. Hydrotheker 

 bægerformige, glatte eller med nogle Rynker paa Tvers og 

 4 Tænder regelmæssig fordelte om Aabningen. 



Gonosome. Gonangier ægfoi'mede med Rynker i den 

 (listale Del og 2 Tænder om Aabningen. 



Et Par Exemplarer af denne Ai-t, 4 — (3 cm, høie, 

 blev fundet under Nordh.-Exp. sammen Thniiiria flicida. 

 Stationens Nummer er desværre ikke bevaret. 



Gonosotne. Gonangia on the stolon, smooth. circular, 

 somewhat compressed at the sides, witli a short aperture. 



Tiiis species was ])reviously found by G. 0. Sårs at 

 Bodo and Lofoten, and by Storm in the Trondhjem Fjord 

 at depths from 80 to 250 fathoms. Sars's specimens. as 

 also those found in the N. Atlan. Exp. wero without 

 gonangia, and the above description of them was given by 

 Storm, who saw them in a few of the specimens found in 

 the Trondhjem Fjord. 



Locality. Unknown. 



Fam. Sertularidae, 



Hi/drantJ/s spindle-sliaped, with filiform fentaelcs in 

 a circle. Hgdrothecæ tulndar or cnp-sJiai)ed, ahvays sessile 

 and more or less intimutehj connected irith the Jii/drocaaliis. 

 tuhich is alivays ramijied, the hranches heing generalhj 

 Xilaced aUernately. 



ln this family, as in Campanidinidce. Levinsen has 

 made a .division of genera, based upon the nature of the 

 lid of the hydrothecæ. But the remark that I made pre- 

 viously is also applicable here, namely. tiiat the nature of 

 the lid and of the margin of the hydrotheca, are very good 

 specific distingnishing features, but that in l)asing a system 

 upon these characters we ascribe to them to nnieh iin- 

 portance. 



Schneider makes all the species of the family form 

 one single genus, Sertidaria, while for practical reasons, 

 he sets up several grou])s within this genus, Itasing his 

 division upon the arrangement of the hydrothecæ on the 

 internodes of the branclies. 



I consider too, that the dividing lines l)et\veen the 

 genera that have been etablished in the various systems, 

 are too uncertain to allow of their being retained; and the 

 various species of Sertidaridæ form an unbroken series. 

 I therefore adhere to Schneiders view that the whole 

 family forms one genus whose species can be arranged in 

 various groups. 



Sertularella gayi, Lamx. 



Trophosome. Hydrocaulus compound, branches al- 

 ternating, but at irregular intervals. Hydrothecæ cu[)- 

 shaped, smooth or with transverse wrinkles, and 4 teeth. 

 at equal distances from one another, ronnd the opening. 



Gonosome. Gonangia oviform with wrinkles at the 

 distal end, and two teeth at opposite sides of the opening. 



Two or three specimens of this species, 4 — 6 cm. 

 high. were found during the N. Atlan. Exp. together with 

 TJuiiaria filicnla. Tiie number of the station has nnfor- 

 tunately not been preserved. 



