PLUMULARIA. 147 
derrated—that illustrate the ‘magnalities of Nature,’ and 
take us by surprise, leaving us in wonderment at what may 
be the great object of this her exuberant production of these 
‘insect multitudes peopling every wave.’ ” 
3. PLUMULARIA PENNATULA, Feather Coralline, G. Mon- 
tagu. (Plate VIII. fig. 24.) 
Hab. Coast of Devonshire, Montagu; on Pinna ingens, 
Cornwall, rare, Couch ; from a crab, and from Laminaria 
digitata, Mr. Peach. ‘ Specimens of this rare and beautiful 
species profusely invest about six inches of the stem of L. 
digitata, obtained in a fresh state by Miss M. Ball at You- 
ghall,”’” W. Thompson; Roundstone, Galway, M‘Calla. 
A person has only to look at the figure in the plate to 
see that “ this coralline is as remarkable for the elegance of 
its form as its likeness to the feather of a pen.” Height 
from three to six inches. I have never seen but one spe- 
cimen of it, and for that I am indebted to the kindness of 
Mr. W. Thompson, who received it from Miss Ball. 
4, PLUMULARIA PINNATA, Branched Sea Bristles. (Plate 
VIII. fig. 25.) 
Hab. On shells, stones, and other corallines ; deep water. 
The finest specimens of this handsome coralline I have 
ever seen were dredged in Lamlash Bay, attached to Pecten 
