VEGA-EXP EDIT TONIENS MEPTENSKAPEIGA ARBETEN. 435 
skovether marsins, forms a piece, 45 mm in length, 20 mm in 
breadth and about 5 mm in thickness. The surface is smooth, 
not furnished with the characteristic mammuleg. Oscula incon- 
spicuous. 'The consistency firm. 
The skeleton consists of spinulate spicules. 
The spinulate spicules (Plate 24, fig. 21) are furnished with 
a great head. Sometimes the spicules are bi- or tri-spinulate; 
they are straight or slightly curved, sharp-pointed. The length 
is variable, not exceeding 1 mm. 
Colour. "The sponge is ash-grey, when preserved in spirit; 
lighter, when dried. 
Habitat. "The east-coast of Greenland, depth 130 fathoms 
(5805). 
Genus Radiella 0. S&S. 
Radiella spinularia Bow. (0. S.). 
Tethea spinularia, Bowerbank, Mon. Brit. Spong., II, pag. 94, III, Plate 15, 
Fig. 23—30. 
Radiella spinularia, 0. Sehmidt, Atl. Spong., pag. 76. 
Of this species we have only one specimen, obtained 
during the above-mentioned expedition. This specimen is 
round, compressed, and perfectly agrees with the Swedish ones 
insonter shape, colour, and inner structure. In the middle of 
the upper surface, there is one very small mammula; the 
marginal parts are darker than the other parts around the 
mammula. The greatest diameter of the specimen is about 
25 mm, the thickness at the middle 8 mm, tapering towards 
the margin. 
Habitat. "The east-coast of Greenland, depth 130 fathoms 
(580,5). 
