19 



Clavellomorpha minima, n. 'g. n. sp. 



Denne Svamp kan jeg ikke henføre til nogen bestemt 

 Slægt og jeg maa derfor give den et eget Navn. Det er 

 et liclet B mm langt kølleformigt Dyr af hvid Farve, eller vel 

 rettere farveløst; dets Bygning kan sees af Tab. V, Fig. 

 2. Der findes ganske faa ac 2 Naale, eler ligger longitudi- 

 nelt anordnede saavel i den tynde Stilk som i den kølle- 

 formige Opdrivning, der er 0,5 mm tyk; desudén findes i 

 denne nogle Mta (cp — 90°), der ligge in de i den køllefor- 

 mige Opdrivning, og endeligt er denne saavelsom Stilken 

 f vidt af en Masse st 2 . 



Findested. 



Station 303. 



Hyalonema arcticum, n. sp. 



Denne Svamp var tør ved Fordampningen af Alko- 

 holen paa Grrund af ufuldstændig Lukning af Karret, hvori 

 den fandtes. Der er flere Exemplar er, indtil 20 m lange, 

 hule, runde Stilke af noget forskjellig Tykkelse, der i den 

 ene Ende sidder ligesom indsænkecle i en meget løs, næsten 

 bomuldlignende Masse, se Tab. VII, Fig. 20, der frem- 

 stiller denne Ende af et af Exemplarerne, og Fig. 21, der 

 fremstiller et Brudstykke af den bomuldlignende Masse; 

 Farven af de tørre Exemplarer er lysgraa, temmelig nøi- 

 agtigt som Tegningens. Den haarde Stamme eller Stilk 

 bestaar udelukkende af lange Naale som Tab. V, Fig. 10, a 

 og a 1 ; mange af disse har en Opdrivning paa Midten, i 

 hvilken der tydeligt sees en Deling af Axekanalen (Fig. 

 10, a). Begge Ender af disse Naale er tr sp (Fig. 10, 6). 

 I den bomuldlignende Masse findes foruden saadanne Naale 

 ogsaa 1) meget store hartrsp (Fig. 10. c). 2) har sp 

 (Fig. 10, cl) og 3) ha (5 r + R sp) (Fig. 10, e). Efter 

 disse Naaleformer maa Svampen være en Hyalonema. 



Findested. 



Station 35. 



Kalksvampe, 



Af saadanne er der ogsaa indsamlet en Del Exem- 

 plarer, og tildels fra temmelig betydelige Dybder. 



Clavellomorpha minima, n. g. n. sp. 



I am unable to assign this sponge to any known 

 genus, and must, therefore, establish for it a personal desig- 

 nation. It is a small animal, club-shape in form, and meas- 

 uring 5 mm long. It is whitish in colour or, more correctly 

 speaking, may be said to be colourless. Its structure is 

 illustrated PL V. fig. 2. Only a very few ac 2 spicules are 

 seen, and these are arranged longitudinally, both in the 

 slender stem, and the club-shaped enlargement, which latter 

 is <0.5 mm thick. Besides these, a few Mta (cp — 90°) spicules 

 are also found, which are placed, inside the club-shaped 

 enlargement, and finally, both it and the stem are occupied 

 by a multitude of st 2 spicules. 



Habitat. 



Station No. 303. 



Hyalonema arcticum, n. sp. 



This specimen was shrivelled, owing to the evapora- 

 tion of the alcohol, by reason of an imperfect closing of 

 the vessel in which it was contained. There are several 

 specimens with hollow, round stems, of somewhat variable 

 thickness, measuring up to 3 cm in length, and which at the one 

 extremity are seated, as if depressed in a very loose, almost 

 cotton-like substance. PI. VII, fig. 20 illustrates this extrem- 

 ity in one of the specimens, and fig. 21 illustrates a frag- 

 ment of the cotton-like substance. The colour of the shriv- 

 elled specimens is light-grey, and the colour is, pretty exactly, 

 repeated in the illustration. The shrivelled trunk or stem 

 is composed, exclusively, of long spicules, such as are 

 illustrated in PI. V, fig. 10, a and a 1 . Many of them 

 have an enlargement in the middle, in which a division 

 of the canal of the axis is, distinctly, seen (fig. 10, a). 

 Both extremities of these spicules are tr sp (fig. 10, 6). 

 In the cotton-like substance there is, in addition to these 

 spicules, also, found; 1) very large hartrsp spicules (fig. 

 10, c); 2) har°sp spicules (fig. 10, d); and 3) ha (5r + B. 

 sp) (fig. 10, e). Judged by the form of these spicules, the 

 specimen must be a Hyalonema. 



Habitat. 



Station No. 35. 



Calcareous sponges. 



Of these sponges, there has, also, been collected a 

 number of specimens, and, in some cases, from rather con- 

 siderable depths. 



3* 



