THTE, PO ENP UERRGS. Q7 
the individuals of the association joined by a common tissue. The 
Bebryce mollis is an alcyonium. It is incomplete as all the alcyons 
are, for it does not possess a bark or cortex which holds together 
mh (\ \\ 
——— in in 
A PORITID/, WITH ITS POLYPES SPREAD. 
(Gontopora colurin«a.) 
the polypes; and the axis which gives it stability is a borrowed 
support. Among the 7udiporine is found the “ Musical coral” or 
“sea organ.” It is composed of a great number of stony tubes, 
most usually straight and slightly radiating. Jts colour is a purple 
red ; at certain distances the mass is crossed by layers, which are 
H 
