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The bihamate spicules (Plate 24, tig. 37) are very eharacteristio
for this species. They are comparatively large and irregularly
C- or S-curved. Such a spiculum is figured by 0. Schmidt
in »Grundziige einer Spongienfauna Atl. Geb.», Pl. 5, Fig. 15,
but I have not seen the description of that species*) which is
armed with these spicules, and therefore I cannot identify my
new species. The length across the spicules is 0,i2 mm.
Colour. Yellow.
Habitat. Davis Strait, Lat. 61° 15’ N., Long. 49° 11’ W.,
depth 70 fathoms (561 S.).
Desmacella Peachii Bow. (O. S.) var. groeniandica n. var.
Plate 24, fig. 38—45, Plate 28, fig. 14.
The shape of this new varietv tolerably well agrees with
that of Desmacella Peacliii Bow. (0. S.); tlie surface is rugged
and open; the sponge is mostly formed by fascicules of large
acuate spicules; tlie sarcode is very sparing. The whole
dermal membrane is destroyed. Oscula and pores
incon-spicuous. The specimen is 30 mm in length, 20 mm in breadth
and 12 mm in thickness.
Skeleton. The skeleton consists of large acuate, small
linear acerate spicules and bihamate spicules of twro kinds.
The large acuate spicules (Plate 24, fig. 38) are the most
numerous; these spicules form the firm fibres of the
sponge-body; they are slightly curved near the base, tapering from it
towards the point. Exceedingly rare are obtuse spicules, which
naturally are monstrous forms of the acuate ones. The length
is 1,2 mm.
The linear acerate spicules (Plate 24, fig. 39, 40). These
spicules are of two kinds, one of them being 0,25 mm in length,
the other 0,0 75 mm. They are congregated in fascicules and
exceedingly slender and straight.
*) Named Desmacella sp.
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