Report on the Porifera collected by the Danmark Expedition. 479 



The specimens in hand fully agree with the descriptions given 

 of A. s. in the litterature. Whether the fragments have formed one 

 or more specimens, it is impossible to state. The biggest fragment 

 has an extension of ca. 150 mm. 



Station 104 b. Lat. 76°06' N. Long. 13°26' W., gravelled clay 

 bottom. 



Depth: 250-200 m . 



Geographical distribution: Atlantic to Arctic ocean. 



Class III. Demospongiae. 



Subclass I. Monaxonida. 



Order Halichondrina, 



Fam. Homorrhaphidae. 

 Subfam. Renierinæ. 



Genus Halichondria Flem. 

 Halichondria tenuispiculata nov, spec. 



One specimen, somewhat damaged, 25 mm. in length, breadth 

 10 mm.; consistency tolerably firm; color yellowish brown; surface 

 finely hispid; ostiae ca. 0,1 — 0,2mm. in diameter. In the skeleton 

 one can just distinguish vague beginnings towards polyspicular fibres, 

 some of these tending towards the surface of the sponge, and ending 

 with spicules projecting slightly beyond the surface, making this 

 hispid; dermal membrane very delicate, transparent. 



The characteristic of the species is, however, the spicules : These 

 are oxea (PI. XXVI, fig. 8 a— d), slightly bent in the middle, rather 

 abruptly pointed, with nearly parallel edges; the length rather constant, 

 about 0,180 by 0,008 mm. : smaller than in any Halichondria species, 

 so far as I know; many developmental forms of spicules are found. 



Station 63. Stormbugt, hard bottom. 



Depth: 20— 40 m. 



Genus Reniera Nardo. 



Reniera cinerea Grant. 



1827. Spongia cinerea Grant [9], p. 204. 



1842. Halichondria cinerea Johnson [13], p. 110, PI. IV, fig. 4. 

 1866. Isodictya — Bowerbank [3 b], p. 241, PI. XLVIII, figs. 



1—5. 



