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Skeleton. The skeleton consists of acuate spicules, of
slender obtuse spicules, of bihamate and of anchorate spicules
of two kinds.
The acuate spicules (Plate 25, fig. 60) are mostly straight;
they are totally smooth, the greatest diameter being at the
middle, tapering towards the base and the pointed termination.
These spicules are placed both in the body and in the arms,
nearest to the central cavities. Their length is 0,9 mm.
The obtuse spicules (Plate 25, fig. 61) are very slender and
smooth, mostly slightly curved; they are not numerous. The
length is 0,2 mm; one end is inflated.
The bihamate spicules (Plate 25, fig. 64, 65). These spicules
are comparatively slender, both C- and S-curved. The straight
length between the points is 0,o4 mm.
The anchorate spicules (Plate 25, fig. 62, 63) agree well with
those of other Cladorhizae. They are of two kinds, one 0,os mm
in length, the other 0,02 mm. The larger are more numerous
than the smaller and furnished with more teeth.
Colour. The sponge-body and the arms are snow-white,
the bulbous inflations of the branches wliite with a tint of
yellow, when preserved in spirit; all the parts a little lighter,
when dried. The lower part of the stem is grey, the surface
being covered with fine sand or clay, strongly adhering.
Habitat. The east-coast of Greenland, depth 130 fathoms
(580 S.).
Cladorhiza cupressiformis Carter.
Plate 25, fig. 66—69, Plate 31, fig. 27.
Esperia cupressiformis, Carter. Ann. Mag. Nat. Hist,, Ser. 4, Voi. 14; On
deep-sea sponges from the Atlantic Ocean, pag. 21-5,
Plate 14, fig. 16—19 and Plate 15, fig. 37.
The only difference between our specimen and Cladorhiza
cupressiformis described by Carter consists in the absence of
the forcepiform spicules. The sponge is long, round, echinated
with short processes, these processes being more or less united
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