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The spined acuate spicules (Plate 25, fig. 40) are totally spined,
the spines being comparatively few in number. They are
thickest at the base, sometimes subspinulate, generally curved.
The length is 0,5—0,55 mm.
The obtuse spicules (Plate 25, fig. 41). These spicules are
very few, totally smooth and usually a little inflated at the
terminations. The length is 0,4 mm.
The bihamate spicules (Plate 25, fig. 43, 44) are comparatively
large, C- and S-formed, the straight length between the points
being 0,i—0,is mm.
The anchorate spicules (Plate 25, fig. 42) are abundant in the
inner membranes as well as in the dermal membrane. Their
length is 0,035 mm.
The forcepiform spiciäes (Plate 25, fig. 45, 46). These spicules
are very characteristic for the species. One of the branches
is shorter tlian the other, the proportion being 1 : 2. They are
inflated at the ends and wholly microspined. The length of
the greater branche, which is curved, is 0,os mm.
Colour. The colour is yellow with a tint of rose.
Habitat. East-coast of Greenland, depth 125 fathoms (579 S.).
Genus Oribrella O. S.
Cribrella hospitalis O. S.
Plate 25, fig. 47—50, Plate 29, fig. 20.
Cribrella hospitalis, O. Schmidt, Grundziige einer Spongien-Fauna des Atl.
Geb., pag. 56, Taf. 4, Fig. 1*2.
Cribrella hospitalis, Carter, Ann. and Mag. of Nat. Hist,, Ser. 4, Vol. 18,
pag. 313, Plate 13. fig. 18, and Plate 15, fig. 36 a, b.
Only one specimen represents this species. The sponge
is blade-like, attached to a stone by a pedicle in the same
manner as Isodictya infundibiäiformis L. (Bow.), Phahellia
ventilabrum L. (Bow.) etc. The length of the specimen is 40 mm,
the breadth 30 mm, and the thickness 8 mm, the margins are
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