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The bihamate spicules (Plate 24, fig. 41, 42, 43) are both
C-and S-curved; they are very numerous in the interstitial
mem-brane8. The smallest are only 0,oo75 mm.
In tlie sponge-body there are numerous gemmules,
com-posed of minute silver-shining balls. The kernel of the
gem-mule is darker than the outer parts, and there is a small
depression like that in the globular spicules of a Geodia Lrak;
but here, I believe, we have true gemmules. I have figured
these gemmules Plate 24, fig. 44, 45.
Colour. The colour is light with a tint of yellow.
Habitat. East-coast of Greenland, depth 130 fathoms (580 S.).
Genus Desmacidon Bow.
Desmacidon Jeffreysii Bow.
Desmacidon Jeffreysii, Bowerbank, Mon. Brit. Spong., II, pag. 347, III
Plate 62, fig. 1—5.
There are only some small pieces of this sponge, the
largest about 40 mm in length and breadtli; the thickness 6 mm.
But the form and consistency of these pieces agree so well
with Desmacidon Jeffreysii Bow., that there can be no doubt
of our having this species before us, although we do not see
its spicules, which agree with those figured by Bowerbank.
Remnants of the cloacee are also visible.
Habitat. East-coast of Greenland, depth 130 fathoms (580 S.).
Genus Hastatus Vosmäer sens. lat, Fristedt.
Hastatus Robertsoni Bow. (Fristedt).
Halichonclria Robertsoni, Bowerbank, Mon. Brit. Spong., IV, pag. 100,
Plate 5, fig. 8—14.
Hastatus Robertsoni, Fristedt, Bidrag till kännedomen om de vid Sveriges
vestra kust lefvande Spongise (i Kongi. Sv.
Vet.-Akad. Handlingar, Bd 21, N:o 6, pag. 34).
This species is represented by several specimens. Both the
outer habitus and the inner structure agree well with those of
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