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Skeleton. The skeleton consists of only acerate spicules.
The acerate spicules (Plate 23, fig. 18). The length of these
spicules is 0,i7 mm; they are slightly curved or straight,
comparatively thick and short-pointed, like those of Isodictya
mammeata Bow., figured in Mon. Brit. Spong., Vol. III, Plate 51,
fig. 8.
Colour. The sponge is greyish, when preserved in spirit.
Habitat. S. E. from Liakov-island, deptli 8—9 fathoms
(53—54 V.).
Chalina grcenlandica n. sp.
Plate 23, fig. 19.
This species differs from the other species which I have seen.
It is blade-shaped, the margins more or less broken. Only two
specimens were obtained, both probably fragments of only one.
The larger of the two is about 60 mm in length, 30 mm in
breadth, the thickness being only 5 mm. The surface is
smooth, furnished with a few larger oscula. The consistency
is exceedingly soft and fragile.
Skeleton consists of only acerate spicules, disposed
in nets.
The acerate spicules (Plate 23, fig. 19) are slightly curved,
short-pointed and 0,2 mm in length.
Colour. Light with a tint of yellow, when preserved in
spirit.
Habitat. East-coast of Greenland, depth 140 fathoms (581 S.).
With regard to the species Chalina Grant, Beniera Nardo
ancl Amorphina O. S., I have been very doubtful whether
I should indicate only the genus or both the genus and
the species, as I now have done. I have not been able to
identify more than a few of them with forms, previously
known; the greater part, however, I have describecl as new,
though one or several of them may have been described before.
Bd. ir. 27
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