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Amorphina fasciculata n. sp.
Plate 24, fig. 5, 6.
There was dredged up only one specimen of this sponge.
It incrusts a bryozoon, forming one piece, the length being 25
mm, the breadth 15 mm, and the thickness not exceeding 15 mm.
The surface is slightly rough. Oscula minute, dispersed. The
consistency fragile. The spicules are not numerous, and they
are situated, the great without order, the small fasciculated.
Dermal membrane pellucid.
Skeleton. The skeleton consists of acuate spicules of
two distinet kinds.
The acuate spicules (Plate 24, fig. 5, 6). The larger of these
spicules are 0,6 mm in length, slightly curved at the base and
sharp-pointed at the other termination. These spicules are
dispersed in the tissues without order.
The smaller, hair-fine acuate spicules are arcuated in the
same manner as the larger, but they are exceedingly fine, a
little shorter and contrarv to the others, fasciculated. They
are about as numerous as the larger ones.
Colour. The sponge is dark with a tint of grey, when
dried.
Habitat. North from Spitzbergen, Lat. 80° 7’ N., Long. 16°
54’ E., depth 60 fathoms (256 Sp.).
Amorphina nodosa n. sp.
Plate 24, fig. 7, 8.
This Amorphina is the largest of ali the species described
in this volume. It is represented by only one specimen from
the arctic expeditions of Prof. Nordenskiöld.
This species is elongated, the length being about 100 mm,
the thickness and the breadth 50 mm. I have seen another
specimen from Greenland, which is much larger, almost
spherical and of the size of a head. Surface, inner structure
and spicules are the same in both specimens. The surface is
rough, furnished with numerous, 1—5 mm long papilla?, and
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