15 



Findested. 

 Station 58, og en anden, hvis Navn er gaael tabt. 



Station Xu. 



which is lost. 



58, 



Habitat. 

 (I another 



station the record 



Desmacidon arcticum. 



ii. sp. 



Et aflangl Eoved paa en temmelig tyk Stilk, Farven 

 livid iT.ili. \'l. Pig. liii. Stilken bestaar af lange trac og 

 tr* Naale, der straaler ml i Hovedet i alle Retninger; i 

 Hovedet en kornet, ufarvel Sarkode, i hvilken lindes mn- :i 

 oi: ane- ii. samt i ringe Anta! - og • (Buer og S-formige 

 Naale) (Tab. III. Pig. 2). 



Findested. 



Station 137. 



Esperia. 



Til denne Slægt tror jeg at maatte henregne de føl- 

 gende Dyr, der alle har tråe og ntt-rnt Naale, og jeg er 

 med Hensyn til dem i den samme Porlegenhed som med 

 de foregaaende, om jeg ska] henføre dem til samme Art 

 eller gjøre Here Arter af dem. 



Paa Tab. VII, Fig. L. 2, 3, 4. 5. 14 og IT) tindes 

 disse Formers ydre Qdseende fremstillet og paa Tab. III, 

 Fig. ii og Tab. IV. Fig. 2 endnu to andre. Som det vil 

 vees. er tie betydeligt afvigende i sin ydre Form. men ved 

 Qndersøgelse at' deres Bygning viser denne sig at være 

 paafaldende ensformig hos dem alle. som det vil sees af 

 Tab. III, Fig. 3. 4, 5, 6. 7 og Tal,. EV, Fig. 1 og 2, 

 idet dr]- hos dem alle lindes Straaler al' Spikier, der rage 

 ud fra en fælles Stamme, dels i Form af tine Naale. dels 

 i Form af Blade; alle disse Naale ei- trac og i det tynde 

 Lag af Sarkode, der ligger udenpaa disse Naalebundter og 

 tildels inde lmdlem Naalene i Stammen tindes rnf-rnf af 

 noget forskjellig Størrelse hos de forskjellige Dyr. men hos 

 alle af samme Form. Hos en enkelt er der ogsaa fundet 

 S-formige Naale (Tab. IV. Fig. 2). 



Efter dette forekommer det mig at være rettest at 

 henføre dem alle til en Art. som jeg vil kalde 



Esperia bihamatifera (Carter), Vosmaer 1 . 

 S-formige Naale findes, som ovenfor bemærket, kun 



• Vosmaer: 'I'll'- family et' the Desmacidinæ. Notes from 

 the Leydeii Museum. Vel. 11. |H~0. 



Desmacidon arcticum. n. sp. 



An oblong head, on a rather thick stem. tind white 

 in colour (Pl. VI, fig. Hi). The stem consists of long 

 trac and //- spicules, which radiate, outwards, in all direc- 

 tions, in the head, [n the head, there is a granular, colour- 

 less sarcode, in which anc s 3, and anc 2 6, spicules appear 

 ami. also, a few -~ and y. spicules (Hows and S-formed 

 spicules) (PI. III. rig. 2). 



Habitat. 



Station No. 137. 



Esperia. 



To this genus. J have found myself obliged to assign 

 the following animals, all of which have true and rut-TUt 

 spicules, and I am in the same difficulty in regard to them, as 

 with the preceding ones \iz. whether to assign them to the 

 same species, or form several species tor them. 



Upon PI. VII, Hgs. 1. 2, :;. 4. 5. 14 and 15 the 

 external habit of these forms is illustrated; and on 

 PL III. fig. <i and PI. IV. rig. 2. still, other two forms are 

 shown. As will be apparent, they are considerably diver- 

 gent in their external habit, but on investigation of their 

 structure, that is seen to be. remarkably, uniform in them 

 all, as may fie seen on referring to PI. Ill, rigs. 3. 4. 5, 

 li. 7 and PI. IV, rigs. 1. ■>: in so far. that in all of them. 

 rays of spicules are found, which shoot outwards from a 

 common root, partly, in the form of slender spicules, and 

 partly, in the form of letnes. All of these spicules are 

 trac in form, and in the thin layer of sarcode which is 

 found outside of these spicular fasciculi, and partly, also, 

 between the spicules of the root, there are found rid-nit 

 spicules. of somewhat different size in the different animal's, bul 

 still having the stime form in all of them. In a solitary one. 

 there are. also, found S-formed spicules (PI. IV, rig. 2). 



It appears to me. from this, that it is best to assign 

 the whole of them to one species, and this I will desig- 

 nate 



Esperia bihamatifera (Carter). Vosmaer 1 . 

 As remarked above, S-formed spicules are foundonly 



1 Vosmaer. The family of the Desmacidinæ. Xetes from 

 the Leyden Museum. Vol. 11. 1R79. 



