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The bihamate spicules (Plate 25, fig. 28, 29) are comparatively
slender. They are C- or S-curved, the straight length between
the points being 0,os mm.
Colour. Dark, when preserved in spirit.
Habitat. Pitlekai, depth 12 fathoms (1035, 1036 V.).
Esperia Sophia n. sp.
Plate 25, fig. 30—32.
The specimen of this new species is massive, probably
thickly incrusting liard objects. The surface is even, slightly
hispid. Oscula few, small and dispersed. Dermal membrane
pellucid, spiculous. The consistency tolerably finn. The length
of the single specimen, which represents this species, is 25 mm,
the breadth 20 mm and the thickness 10 mm.
The skeleton consists of spined acuate spicules, obtuse
spicules, and equianchorate spicules.
The spined acuate spicules (Plate 25, fig. 31) are the largest.
Their length is 0,5 mm. They are always slightly curved, the
greatest diameter being at the base, tapering towards the pointed
termination. They are totally spined, though the spines are
few in number.
The obtuse (cylindrical) spicules of the dermis (Plate 25, fig. 31).
These spicules are most often curved; the terminations are
round, sometimes microspined. The length is about 0,3 mm.
The equianchorate spicules (Plate 25, fig. 32) are very numerous.
Their length is 0,033 mm.
Colour. The colour of the dried specimen is light with a
tint of yellow.
Habitat. East-coast of Greenland, depth 130 fathoms (580 S.).
Esperia villosa Carter.
Plate 25, fig. 33—38, Plate 29, fig. 19.
Esperia villosa, Carter, Ann. Mag. Nat, Hist., Ser. 4, Vol. 14, pag. 213, Plate
13, fig. 13—15, Plate 15, fig. 36.
This sponge is thickly incrusting stones and other hard
objects. It is compressed, more or less blade-like, the largest
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