456 BUR TAS CRLEND ER SEP OINIG "ENS 
the greatest diameter at the middle, tapering towards the round 
base and the abruptly pointed end. The length is 0,,—1 mm. 
The obtuse spicules of the cortex (Plate 25, fig. 57) are always 
more or less irregularly curved; one of the terminations is 
generally a little inflated; they are microspined, the spines 
being exceedingly minute, smaller than in other microspined 
spicules which I have seen. The length is 0,12 mm. 
The bihkamate spicuwles (Plate 25, fig. 55) are both C=Slamdiet 
curved, the straight length between the points being 0,02 mm. 
The ineqwianchorate spicuwles (Plate 25, fig. 39) are not so 
numerous as the other spicules of the sponge. Their length 
is 0,06 mm. 
Colour. " Yellowish with a tint of rose: 
Habitat. East-coast of Greenland, depth 130 fathoms (580 5). 
Cladorhiza nobilis n. sp. 
Plate: 25, fig. 60—065, Plate 51, hg. 20. 
The single specimen, which - represents this species, is 
very fine and well preserved. It is the most beautiful sponge 
from the arctic regions of all the sponges of the Zool. State- 
Museum at Stockholm. The shape corresponds well to 
0. Scehmidt's and Hansen's figures of Cladorhiga concrescens 
O. S.F) and Desmacidon (!) giganteum Hansen”). But these two 
species are compact, and our new species is hollow. The length 
of the species is 110 mm, the thickness at the middle 10 mm. 
The sponge is furnished with 24 branches, which are inflated 
at the ends. The length of these arms or branches is about 
25 mm, the thickness 2—3 mm; the diameter of theromikep: 
inflations is 6 mm. Two of the lower branches and eight of 
the upper ones are anastomosing; the others are free. 'The 
surface is even and tolerably smooth, the branches exceedingly 
slightly - hispid. I have not seen the root of this species 
was broken off by the dredge. 
7) O. Schmidt, Die Spongien des Meerbusen von Mexico, pag. 83. 
Tal Re sg 
2) G. A. Hansen, Den norske Nordhavsexpedition 1876—78, XIII, 
Spongiadee, pag. t£TP 2 fig. 12-13 Plog fo 8 
