sand-grains etc. are present, the colour seems to be rather pellucid C 
light gray. 
Skeleton (fig. 10) composed of a rather irregular netlike tissue | 
of spongin-fibres, which can attain a thickness of up to ca. 150 
the most common thickness ca. 65 spicules as a rule in one- 
spiculated rows; there may, however, be unto three spicules side^ 
by side in the row. 
Spicules I ^ ^ ^o X ® small, smooth, cylindrical,: 
slightly bent in the middle, rather abruptly pointed to a not very 
Sharp point; they are often rather blunt; length ca. 72 by 6,2 p. 
2. strongyla, of very seldom occurrence, straight, length 117 
by n I am rather inelined to regard these as foreign bodies,, 
as they are not strongylated forms of the common oxea. 3. sig¬ 
ma ta rather regularly curved, varying from 13—60 in lengthj 
by a thickness up to 2,7 sizes about 30—35 f-v the mosti 
common. 
Fig. 12. Gelliodes filiforinis, nov. sp. Skeletal flbres. 
