146 HISTORY OF BRITISH ZOOPHYTES. 
Bay, Dr. Scouler; Mr. Tudor, Bootle; Prof. H. Forbes, Isle 
of Man. 
The little radical tubes of this coralline are often found 
eutwined around the stem and branches of Halidrys. 
“ From these arise little branches like feathers; each 
smaller division of a branch is curved, when dried, like a 
sickle, and the denticles (cells), which are fixed in a row on 
the inside, are shaped, when magnified, like the flowers of 
the lily of the valley.” (Zidis.) The vesicles are large and 
very curious, resembling a swollen pod, with several cris- 
tated ribs girding it. When recent, Dr. Coldstream states 
“that they are translucent, and that six or seven dark oval 
masses may be seen with each, which seem to be ova.” 
This coralline is a great favourite of mine, and it is often 
found after a storm on the Ayrshire coast, and always on 
Halidrys siliquosa. When in the water, or fresh from the 
deep, it is remarkably beautiful; every branch is like a 
handsome little feather, generally of a rich cream-colour, 
occasionally finely tinted with red. Mr. Lister remarks, 
“ Many specimens all united by a common fibre, and all the 
offshoots of one common parent, are often located on one 
seaweed, the site then of a population which nor London 
nor Pekin can rival. It is such calculations—always un- 
