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The rosettes with obtuse branches (Plate 23, lig. 15—16). These
rosettes differ in many ways from the above described ones.
They are simple and radiating into all sides from the centre;
they are not sharp-pointed, but they have at the ends a
bonnet-like inflation. This inflation is at the margin divided in four
great spines. The rest of the spicules is microspined, excepting
the bonnet-like inflation, which is smooth. These spicules
are almost as numerous as the preceding ones and have also
the same size, viz. 0,os mm from the centre to the termination
of a ray.
’’V
Colour. Cream-white in the dried state or when preserved
in spirit.
Habitat. Baffin Bay, Lat. 75° 26’ N., Long. 67° 27 W., depth
260 fathoms (542 S.).
III Halisarcinse 0. S.
Genus Halisarca Dujardin.
? Halisarca Dujardinii Johnston
Halisarca Dujardinii, Johnston, Brit. Spong. pag. 192, Plate lij fig. 8, 1842.
This species is represented by only one specimen from
the expedition of tlie Vega. This specimen is large, forming a
compressed cake-like mass, the greatest diameter being 75 mm,
the smallest about 50 mm; the thickness varies much, not
exceeding 10 mm. The surface is smooth, the consistency
very fleshy.
As the structure of the Halisarcince O. S. is so very uniform
I, who have not seen any specimen of Halisarca Du_j., am a
little doubtful, whetlier I shall identify this species as Halisarca
Dujardinii Johnston, or not.
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