VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 451 
The bihamate spicules (Plate 25, fig. 28, 29) are comparatively 
slender. They are C- or S-curved, the straight length between 
the points being 0,05 mm. 
Colour. Dark, when preserved in spirit. 
Habiat;  Pitlekai, depth 12 fathoms (1035, 1036 VV.) 
Esperia Sophia n. sp. 
Plate 25, fig. 30-—32. 
The specimen of this new species is massive, probably 
thickly inerusting hard objects. The surface is even, slightly 
hispid. Oscula few, small and dispersed. Dermal membrane 
pellucid, spiculous. The consistency tolerably firm. 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 (380 5). 
Esperia villosa Carter. 
Flaten ae JT Plate 20 no 
Hsperia villosa, Carter, Ann. Mag. Nat. Hist., Ser. 4, Vol. 14, pag. 213, Plate 
13, fig. 18—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 
