
MARINE ALG OF THE L.M.B.C. DISTRICT. 135 
G. corallina, Ag. 
Isle of Man (M); locality not recorded (L). 
G. equisetifolia, Ag. 
In drift on Lancashire and Cheshire coasts (M). 
Ptilota elegans, Bonnem. 
P. sericea, Harvey. 
Common (M); abundant. at Puffin I. (G). 
P. plumosa, Ag. 
Locality not recorded (M and L); Puffin I. (G). 
Ceramium tenuissimum, J. Ag. 
C. nodosum, Harvey. 
Hilbre I. (M); Puffin I. (G). 
C. fastigiatum, Harv. 
Hilbre I. (M). 
C. deslongchampu, Chauv. 
Hilbre I., New Brighton (M). Very abundant on 
Puffin I., parasitic on many species of Aleze (M and 
G). The figure shows a branch of C. deslongchampii 

with twigs transformed into clasping organs. In 
this case the supporting plant was a stout filament 
of Porphyra laciniata, but I have found it with 
similar attachments to Chylocladia articulata, Cera- 
mium rubrum, and other species. In some specimens 
