CLASSIFICATION. 
Spong. 7 
canals by special canals ; fibres anastomose to form an irregular 
network ; axis of fibres scarcely visible ; main fibres always, the 
other fibres often, contain sand and other foreign bodies ; ground 
substance in the neighbourhood of the ciliated chambers with 
numerous granules ; characteristic filaments in addition to skeleton- 
fibres abundant. Hircinia , Oligoceras. 
Lendenfeld (11) illustrates the relationship between the genera of 
Aplysinidce and the species of Aplysilla and Dendrilla as follows 
A. rosea, A. sulphur ea, A.violacea ) 
Schze. Sclize. R. v. L. 
v J 
D. rosea , D. aerophoba , 
R. v. L. R. v. L. 
v , J 
Aplysilla , 
Crusts, numerous single 
spongiolin trees, 
v 
Aplysinince , 
Small pear-shaped flagellated cham- 
bers, granular matrix; anastomos- 
ing, horny fibres. 
Dendrilla f 
Stalked clumps, a single 
spongolin tree (for skeleton). 
% » 
Aplysillina , 
Large sac-like flagellated chambers, 
hyaline matrix ; not anastomosing, 
tree-like, horny fibres. 
Aplysinidce, 
Horny fibres without foreign bodies, with central mark cylinder. 
Carter (2) institutes a new family, the Theneanina , to receive the 
genera Thenea , Gray, and Eccionema, Bwk. The Pachylragidce 
(Carter) will now include 4 families, viz., Geodina , Stellettina , Tethyina , 
Theneanina. 
The Geodina are subdivided as follows : — 
I. Orthactinida (arms of trifid spicule simple). 
a. Proradiata. b. Planiradiata. c. Rccurviradiata. 
II. Dichelactinida (arms of trifid spicule bifurcate). 
a. Proradiata. b. Planiradiata. c. Recur viradiata. 
The Stellettina : — 
I. Psilodermata (thin skinned). 
a. Stellifera, with minute stellata. b. Bacillifera, with bacil- 
liform bodies. 
II. Pycnodermata (thick skinned). 
a. Discifera , with discoid bodies, b. Globostellata , with globo- 
stellates. 
The Tethyina , Carter (= Tetillina , Soil.) : — 
I. Azosta, without zone spicules. 
a. Sessilia, sessile, b. Radicifera , rooted. 
II. Zostorophora , with zone spicules, 
a. Sessilia. b. Radicifera. 
The Theneanina , characterized by spinispirules, comprises: — 
Thenea , Gray (T.muricata, Bwk., T. wallichi, Wright, T. fenes- 
trata , O.S.). 
Eccionema , Bwk. ( E . compressa, Bwk., and E. nana , Carter). 
