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The small bihamate spicules (Plate 25, tig’. 19) are more
numerous than the preeeding. They are very minute; the
straight length between the points is only 0,oo65 mm.
Colour. Yellowish brown, when dried.
Habitat. Spitzbergen, Lat. 80° 7’ N., Long. 16° 54’ E., depth
60 fathoms (256 Sp.).
Genus Myxilla O. S.
Myxilla septentrionalis n. sp.
Plate 24, fig. 4.
This sponge is coating, thin, the greatest thickness not
exceeding 3 mm. Our single specimen is 80 mm long, its
greatest breadth 20 mm. The surface is even and smooth,
gelatinoid. Oscula and pores are not visible. The outer part
of the sponge is like that of a fleshy Suberites Nardo, but the
consistency is much softer in this new species.
The skeleton consists of obtuse spicules.
The obtuse spicules (Plate 24, fig. 4) are congregated in
fascicules and tolerably numerous; they are generally straight.
One termination is a little thicker than the other, sometimes
slightly spinulated, the length 0,3 mm.
Colour. The colour is yellowish-grey, when preserved in
spirit.
Habitat. Konyam Bay, depth 2—16 fathoms (1058 V.).
Genus Cornulum Carter.
Cornulum ascidioides n. sp.
Plate 25, fig. 1, 2, Plate 29, fig. 21.
The outer form and shape sufficiently indicate a species
of the genus Cornulum Carter. Four specimens represent the
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