6 LIVERPOOL BIOLOGICAL SOCIETY. 
Monospora pedicellata, Sol. 
Callithamnion pedicellatum, Harvey. 
Locality not recorded (M), (i). Puffin I. (G). 
Spermothamnion turnert, Aresch. 
Callithamnion turnert, Harvey. 
Locality not recorded (M). 
Niccaria wigght, Endl. 
Isle of Man (M). 
Family. HELMINTHOCLADIIDA. 
Nemalion multifidum, J. Ag. 
The coast generally (M). 
Family. CERAMIIDA. 
Rhodochorton rothu, Nig. 
Callithammnion rothu, Harvey. 
Common on the rocks and pier walls (M). 
R. floridulum, Nig. 
Callithammon floridulum, Harvey. 
Locality not recorded (M). Puffin I. (G). 
Anthithamnion cruciatum, Nag. 
Callithamnion cruciatum, Harvey. 
In rock pools at Hilbre I., parasitic on Cladostephus 
spongrosus (M). 
A. plumula, Thur., var. genwinum. 
Callithamnion plumula, Harvey. 
Isle of Man (M). 
Callithamnion pluma, Ag. 
Parasitic on stems of Laminaria digitata and other 
species, Puffin I. (G). 
C. thuyoides, Ag. 
Isle of Man (M). 
C. polyspermum, Ag. 
Many localities (M). 
