photo B. Picton
from Sponge Guide IV, B. Picton
from Sponge V
from Sponge IV
SEM photo, side and dorsal view
Bowerbank, 1874
SEM picture of spurred anisochela
Bowerbank's figures of H. ingalli and H. scandens
Bowerbank's (1874) pl. XXIV figs. 1-6
Sponge V, C. Morrow's drawing of spicules