MARINE ALGZ OF THE L.M.B.C. DISTRICT. 27 
Lyngbya maguscula, Harv. 
Not uncommon at Hilbre I., Eastham, and Wal- 
lasey (M). 
L. semiplena, Ag. 
Calothriz semiplena, Harvey. 
Generally distributed (M). 
L. estuarw, Liebm. 
L. ferruginea, Harvey. 
Bromborough Pool and Hilbre I. (M). 
Microcoleus chthonoplastes, Thur. 
M. anguiformis, Harvey. 
Generally distributed (M). 
Oscillatoria littoralis, Carm. 
North and South shores (M). 
O. spiralis, Carm. 
Eastham (M). 
O. nigroviridis, Thwaites. 
Eastham (M). 
Family. CHROOCOCCID. 
Gleocapsa crepidium, Thur. 
On stones near high water mark, at Puffin I. (G). 
