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The surface is furnished with numerous pointed mammulae,
being in length about 2 mm. The wliole specimen is 10 mm
long and 6 mm broad. The colour is light yellow. The
spicules agree well with those of Bowerbank’s type-specimen,
figured III, Plate 27, fig. 1 — 3.
Habitat. North-cape, Lat. 71° 13’, Long. 26° 2’, depth 180
fathoms (30 N. S.).
Hymeraphia spitzbergensis n. sp.
Plate 24, fig. 18—20, Plate 27, fig. 12.
This species is a true Hymeraphia according to the
de-scription given by Bowerbank of this genus in his
Mono-graph, vol. I, pag. 189. In our collection we have only one
specimen of this spec-ies; it inerusts a worm-tube, 20 mm
long, 5 mm thick. From a single basal membrane spring
numerous large spicules passing through the surface of the
sponge, which is therefore hispid almost as the thin-haired
tail of a rat. I have not seen the oscula which are probably,
as in other Hymeraphia}, minute, dispersed.
Skeleton. The skeleton consists of very long spinulate
spicules and of slender acuate or rarely subspinulate spicules.
The long spinulate spicules (Plate 24 fig. 18) are by their
base attached to the basal membrane. They are generally
slightly flexuous, tapering from the base to the long and
slender point. The length of these spicules is variable, not
exceeding 2,5 mm.
The slender acuate spictdes (Plate 24, fig. 19, 20). The
disposition of these spricules is very characteristic. They are
collected in bundles, placed in tlie inner parts of the sponge
and not passing through tlie dermis as the spinulate spicules.
The length is 0,3 mm. They are as tlie other kind straight
or curved.
Colour. Grey, when dried.
Habitat. Spitzbergen (Sp.); the exact locality and the depth
unknown.
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