12 



Myxilla grisea, n. sp. 



En flad, grenet, lysegraa Svamp (Tab. VI, Fig. 9), 

 der foruden ane 2 3 Spikier kun har glatte Spikier, dels 

 tyncle tr 2 , dels tykke, tr 2 og trac Spikier. De to sidst- 

 nævnte Former er licit krummede (Tab. I, Fig. 3). 



Findested. 



Station 84. 



Myxilla brunnea, n. sp. 



En stor, bladdannet Svamp af brun Farve (Tab. VI, 

 Fig. 5), der har en hul Overflade. Den har ingen faste 

 Fibre (keratode Fibre). Saavidt det kunde iagttages, be- 

 stod dens Spikier af ac 2 sp. og tr 2 sp. svagt krummede, 

 desuden ane 2 3 (Tab. III, Fig. 1 A). 



Pindested. 



Station 275. 



Myxilla flabelliformis, n. sp. 



Ogsaa et stort, vifteformigt Blad, men af graa Farve 

 (Tab. VI, Fig. 6). Heller ikke det har nogen faste 

 (keratode) Fibre. Dets Spikier ere ac 2 og ane 2 3 (Tab. 

 II, Fig. 14). 



Findested. 



Station 359. 



Jeg har betegnet de to følgende Svampe Sclerilla, og 

 ved at gjøre dette lagt Vægt paa Spiklerne alene uden at 

 skjænke Schmidts Sarkode-Membran og Fibre nogen Op- 

 mærksomhed. 



Sclerilla arctica, n. sp. 



En graafarvet, flad Kage med runde Kanter, noget 

 aiiang og forsynet i den ene Ende med en fragmentær 

 Overflade, der kunde synes at vise, at den har siddet paa 

 en tynd Stilk (Tab. VI, Fig. 15). Den bestaar af Bundter 

 af ae 2 Spikier, og imellem disse Bundter finder man en 

 farveløs Sarkode, hvori man opdager ane 2 3 Spikier. I 

 Periferien er der et Lag af kortere ac 2 sp. Spikier, som ere 

 tæt sammenpakkede og skjære hinanden i alle Retninger 



Myxilla grisea, n. sp. 



A flat, branchy light-grey sponge (PL VI, fig. 9) 

 which has, besides ane 2 3 spicules, only, smooth spicules, 

 partly, thin tr 2 , partly, thick tr 2 and trac spicules ; both the 

 last named forms being slightly curved (PL I, fig. 3). 



Habitat. 



Station No. 84. 



Myxilla brunnea, n. sp. 



A large, leaf-shaped, brown coloured sponge (PL VI, 

 fig. 5) having a cavernous surface. It has no solid 

 fibres (keratode fibres). As far as could be observed, its 

 spicules consisted of ac 2 sp. and tr 2 sp. gently .curved, 

 besides anc 2 3, (PL III, fig. 1 A). 



Habitat. 



Station No. 275. 



Myxilla flabelliformis, n. sp. 



Also a large leaf, of fan-shape, but grey in colour 

 (PL VI, fig. 6). Neither does it contain any keratode 

 fibres. Its spicules are ac 2 and anc 2 3, (PL II, fig. 14). 



Habitat. 



Station No. 359. 



I have designated the two following sponges, Sclerilla, 

 and in doing so, lay stress upon the spicules only, without 

 paying any attention to Schmidt's sarcode membrane and 

 fibres. 



Sclerilla arctica, n. sp. 



A grey-coloured, flat, cake jwith rounded margins, 

 somewhat oblong, and furnished at the one extremity, with 

 a fragmentary surface, which would appear to show, that it 

 had been seated on a thin stem (PL VI, fig. 15). It consists 

 of fasciculi of ac 2 spicules, and between these fasciculi, 

 there is found a colourless sarcode, in which anc 2 3 spic- 

 ules appear. In the periphery, there is a layer of shortish 

 ac 2 sp. spicules, which are closely packed, and intersect each 



