224 THE NATURALIST IN AUSTRALIA. 
Bi 
W. Saville-Kent, Photo, 
STINGING ANEMONES, Actinodendron alcyonidium. TWO-THIRDS OF NATURAL SIZE, p. 223, 
central area or disc which surrounds the mouth was in the Lacepede Islands 
specimens of the same pale yellowish-green as the greater mass of the tentacles, but 
diversified with spots of brown. This character is distinctly shown in the example, 
B, to the right of the two individuals here figured. 
Among the more remarkable representatives of the Sea Anemone or Ccelenterate 
tribe figured and described in the author's volume relating to the Queensland Great 
Barrier system, was the species upon which the writer provisionally conferred the title 
of Acrozoanthus austrahw. It belonged to that particular group of the Sea Anemones 
which is technically known as the Zoantharia, and whose members are recognisable 
from the circumstances that the zooids or individuals form more or less extensive 
socially united colonies in place of separating asunder and maintaining an independent 
existence, as happens with the ordinary Sea Anemones or Actinaria. As a rule, these 
social Zoantharia form encrusting colony-stocks on stones, shells, or other submarine 
objects. One noteworthy form, Palythoa, is remarkable for its constant association 
with the Glass Rope Sponge, Hyalonema Steboldii, on the erect rope-like spicular 
stalk of which organism it develops its encrusting cenosarc. The question as to 
