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Skeleton. The skeleton consists of only one kind of
spicules, viz. acuate.
The acuate spicules (Plate 24, fig. 14) are perfectly smooth,
tapering from the round base to the sharp point. They are
generally slightly curved near the base. The length is 0,3 mm.
The spicules are, as in Isodictya infundibuliformis,
con-gregated in a net-work more or less regular.
Colour. The larger of the two specimens is ash-grey, the
smaller yellowish-light, both are preserved in spirit.
Habitat. Greenland, Baffin Bay, Lat. 75° 26’ N, Long. 67°
27’ W., depth 260 fathoms (542 S.).
VI Suberitidinse 0, S.
Genus Suberites Nardo.
Suberites montalbidus Carter.
Suberites montalbidus, Carter, Ann. and Mag. of Nat. Hist., ser. 5, vol. 0,
pag. 2-56.
Suberites montalbidus, Fristedt, Bidrag till kännedomen om de vid
Sveriges vestra kust lefvande Spongiae, Kongi. Svenska
Vet.-Akad. Handlingar, Bd 21, No 6, pag. 19, Tafl. 2,
fig. 4 a—4 e.
Suberites spec., Vosmar, Report on the sponges dredged up in the arctic
sea hy the »Willem Barents» in the years 1878 and
1879 (in Nied. Arch. Zool., Suppi. 1, pag. 82, Plate 1,
fig. 22—23, Plate 4, fig. 140—144).
In the collection of sponges, obtained during the Swedish
arctic expeditions conducted by Prof. A. E. Nordenskiöld,
there are several specimens of this species. All agree very well
with Suberites spec., described by Vosmasr. The spicules are:
1) acuate, transient to spinulate, 2) misrospined inflato-acerate,
and 3) microspined infiato-obtuse (= inflato-cylindrical Bow.,
Mon. I).
At my first examination of specimens of Suberites montalbidus
Carter from the west-coast of Sweden, I could not find the
spination of the small inflato-acerate and obtuse spicules; the
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