160 
straight tylostyli are found; thickness almost the same from head 
and over V* of the spicule, but then tapering to “ PJ'’ 
the small spicules, however, are tapering only m the last fifth or 
sixth; head beautifully marked off, srtuated in most cases a 
base- but there are also found specimens with the swelling at a 
little’distance from the base; apparently the shaft does not grow 
as fast as the head; all grown-up spicules have heads, the dia¬ 
meter of which is only a little larger than that of the shaft Length 
very varying, from ca. 130 p-520 ^ ; sizes about 220 and 
430 ,< most common; thickness rather constant, shorter forms ,ust 
as thick as the longer, ca. 7—8 f-i. 
Suberites ramosus nov. sp. 
Perseverance Harbour; Campbell Island. 10-20 f. Sandy mud. 9/X11.1914, 
We only possess fragments, some cm in length. Very irregular, 
forming a clustering tuberous cover on seaweed; to be precise the 
sponge consists of irregularly and densely anastomosing branches, 
4-8 mm thick. Dermal-membrane very thin, but in most places 
macerated off. Consistence soft, incoherent. Oscula? ostia? Colour 
pale reddish-gray. 
Skeleton consists of long and comparatively thick (up to 70 mm) 
spicula-fibres, some of which are directed nearly parallel with, though 
a little converging towards the surface; other fibres are Crossing 
these fibres at various angles, but with almost the same inclin- 
ation to the surface; the dermal membrane seems to be sustaine 
bv a layer of smaller spicules at an oblique angle, lymg with the 
apices outwards directed; often they appear as tufts, continuatmg 
the spicula-fibres; several isolated spicules are lymg pell-mell be- 
tween the fibres; these latter are branching and again confusmg, 
so that the whole skeleton appears as rather indistinct and i- 
fused. H 
Spicules: (fig. 33) tylostyli; straight or a little curved some-, 
where on the shaft, tapering evenly to a sharp point; head we 
marked off; varying greatly in length, from ca. 200 p to ca.500 i>, 
by a thickness of up to 11 
