Genera Axinella, Phakellia, Acanthella a. o. 
319 
Acanthella Phacanthia Raspailia 
No extra-axial part dis-| No extra-axial part| Axial and extra-axial 
tinguishable. distinguishable. part clearly distinguish- 
able. 
The basal stem soon di- 
vides into branches, each 
branch representing a funis. 
Angle between branches 
often 45° and more. Funes 
never anastomose; they 
leave large portions of 
sponge tissue without spi- 
ceules. The spicules com- 
posing a funis hardly 
project; hence funis rather 
mooth. 
Composed of a network 
of funiculy, forming one 
branched funis. 
Each funieulus composed 
of & few (1—6) spicules, 
only partly imbedded in 
spongin. 
About 20-100 u 
transverse diameter. 
in 
Formed by innumerable 
funieuli. 
Formed by anastomosing 
funieui. Not visible to 
the naked eye. 
Absent. 
Styli. 
The basal stem soon di- 
vides into branches, each 
branch representing a funis. 
Angle between branches 
seldom more than 30°, Funes 
rarely anastomose. The 
spieules composing the funes 
very much projecting ; hence 
funis very hirsute and places 
devoid of spicules consi- 
derably smaller than in 
Acanthella. 
Composed of a network 
of funiculi, forming one 
branched funis. 
Each funiculus composed 
of a few spicules. Kept 
together by still less spongin 
than in Acanthella. 
About 20— 100 u in trans- 
verse diameter. 
Formed by innumerable 
funieuli. 
Formed by anastomosing 
funieuli. Not visible to the 
naked eye. 
Absent. 
Styli. 
— 
Te 
Basal stem for a long 
while undivided; higher 
up (almost always dicho- 
tomously) ramifying; each 
branch represents a funis. 
They only aceidentally fuse 
(no true anastomosis); hence 
not formiug a network. 
Composed of a network 
of funiculi, forming one 
generally branched funis. 
Each funieulis composed 
of spongin in which a few 
(1—7) spieules wholly or 
nearly wholl imbedded. 
About 150-300 u in 
transverse diameter. 
Formed by about 100 
funieuli. 
Formed by anastomosing 
funieuli. Not visible to 
the naked eye. 
Funieuli of 1—3 spieules 
start at about right angles 
from the axis. Each funi- 
culus terminating into a 
single long stylus, far 
projecting beyond the sur- 
face. At the bases of the 
projeeting part a brush of 
small diverging styli sur- 
round the large one. 
Styli and acanthostyli. 
Maximal size of large styli 
(projecting) 2500 « and 
more; of those in brushes 
500 u. 
