87 



Selaginopsis obsoleta, Lipechin. 



Tal.. VL Fvj: :i). 



Trophosome. Hydrocauhis enkel, Forgiviiing alter- 

 nerende i et Plan ; Hoyedstannneii zikzakbøiet, iidcn Hy- 

 drotlieker og tydelig delt i nlige lange Led. Hydrotheker 

 indleiret i Stammen, ea. G i hver Kreds. Kredsene er tæt 

 stillet over hinanden. og saaledes at hver Hydrothek i en 

 Kreds staar vertikalt over et Melleninini i den nedenfor 

 liggende. Hydrothekerne smalner at' mod Aabiiingen. der 

 er oval og med glat Rand. 



Gonosome. (ronangier omvendt kogleformige. tindes 

 spredt over Grenene, men mest i)aa den Side at' dem. der 

 vender mod Koloniens distale Ende. 



En Del Kolonier af Selaginopsis, som Tandtes under 

 Nordli. -Exp. maa nærmest henføres til ovenna^vnte Art, 

 der tindes omtalt af Kirchenpaupr (71)*. 



Kidonien er ca. '20 cm. hoi og har Form som et hoit 

 Triangel. Som Fig. o viser, kan man tydelig folge Kolo- 

 niens Va'.\t (sandsynligvis AarstilvextenJ, idet det oprinde- 

 lige Tri;nigels Flade er foroget ved at nye Lag er tilføiet 

 paa dets Sider. Hvis hvert af disse Lag representerer et 

 Aai-s Tilvext, kan man paa en Koloni af denne Art uden 

 Vanskelighed læse dens Alder. Nærværende Exemplar 

 havde isaafald begyndt sin tredie Sommer, og den lille 

 Sidegren skjod ud i Lohet af Koloniens andet Aar. 



Gonangiei'ne, der er smaa i Forhold til Hydrothe- 

 kernes Størrelse, staar ikke omtalt i Kii-kenpaiiers Beskri- 

 velse af Arten. De er kegleiormige, fæstet til Grenene 

 med sin Spids og ret afskaarne i den distale Ende. 



Pindested. St. 322. 



Selaginopsis arctica, n. sp. 



(Tal.. VI, Fi-. 1'. 



Trophosome. Hydrocaulus eukcl, svagt hoiet og delt 

 i ulige lange Led; Forgrening fjærformig i et Plan. Saavel 

 Stamme som Grene hærer Hydrotheker i 4 Længderækker 

 (enkelte Grene bai-e to). Hydrothekerne er indleiret i 

 Stammen, smalner af mod den distale Ende og har oval 

 Aabning med glat Rand. 



Gonosome. Gonangier staar i tætte Rækker paa 

 Grenenes Overside og er lidt lamger end Mellemrummet 

 mellem to Grene. De er kegleformige, fæstet med Spidsen 

 og har et ydre Marsupium. 



Denne Art er mindre end den foregaaende, og den 

 er let kjendelig ved de 4 regelmæssige Læ.ngdenekker, der 

 dannes af helt indleirede Hydrotheker. Grenene, der ud- 

 gaar alternerende fra Hovedstammen, er ofte selv dichoto- 

 misk delte i Spidsen. 



Selaginopsis obsoleta, Lepeehin. 

 (I'l. Vt, tio. :,,. 



Trophosome. Hydrocaulus simple, ramification alter- 

 nating in one plane; main stem zigzagged, without iiydro- 

 thecæ, and distinctly divided into unequal joints. Hydro- 

 thecæ imljedded in the stem, about 6 in every circle; the 

 circles are close together. one above another. and in sucli 

 a manner that eacli hydrotheca in a circle is vertically 

 over an interspace in the circle below. The hydrotiiecæ 

 taper towards the opening, which is oval and has a smooth 

 margin. 



Gonosome. Gonangia of an inverted conical form. 

 scattered over the branches, but chiefly on the side which 

 is turned towards the distal end of the colony. 



Some of the colonies of Selaghiopsis that where found 

 in the N. Atlan. Exp. must be referred to the above spe- 

 des, which is mentioned by Kirehenpmier (71)*. 



The colonv is about 20 cm. in lieight, and has the 



form of a high triangle. As shc 



fio;. 3 the arowth 



of the colony can be distinctly followed (probably yearly 

 growth) in the addition of new layers on the sides of the 

 original triangle. If eacii of these layers represents a 

 year's growth, the age of a colony of this species may be 

 easily told. On a supposition of tiiis kind, the present 

 specimen bad entered upon its third sunnner. and the 

 little lateral l)rauch grew out in the course of tlæ eolony's 

 second year. 



The gonangia. wjiich are small in comparison to the 

 hydrothecæ, are not mentioned in Khrlieiipaucrs descrip- 

 tion of the species. They are conical, attached to the 

 branch by their apex. and abruptly truncated at tiie 

 distal end. 



Loeality. Station 322. 



* Jeg har desværre ikke havt Anledning til at se Lcpechim egen 

 Boslirivelse af Arten. 



Selaginopsis arctica. n. sp. 



(VI VI. tiu. 4), 



Trophosome. Hydrocaulus simple, slightly curved. 

 and divided into unequal joints; ramification spiral in one 

 plane. Both stem and branches bear hydrothecæ, standing 

 in 4 longitudinal rows (a few branches ouly 2). Hydro- 

 thecæ iml)edded in the stem. taper towards the distal end, 

 and have an oval opening with a smooth margin. 



Gonosome. Gonangia stand in thick rows upon the 

 upjjcr side of the l)ranclies. and are a little longer tiian 

 the space between two branches. Tliey are conical, atta- 

 ched by tlie apex, and have an external marsupium. 



The species is smaller than the preceding one, and 

 is easily recognisable by the four regular longitudinal rows. 

 formed of whoUy imbedded hydrothecæ. The branches, 

 which grow alternately from opposite sides of the main 

 stem, are often dichotomous at the apex. 



* Lepechbis original description I have unfortuuately not. liad an 

 opportunitv of seeiug. 



