154 - LIVERPOOL BIOLOGICAL SOCIETY. 
Lyngbya maguscula, Harv. | 
Not uncommon at Hilbre L., Haatiens and Wal- 
lasey (M). . 
LL. semiplena, Ag. 
Calothrix semiplena, Harvey. 
Generally distributed (M). 
L. estuari, 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. CHROOCOCCIDA. 
Gleocapsa cr epidium, AVarowe 
On stones near high water mark, at Puffin v a 

