316 GUERNSEY. 
Polysiphonia nigrescens, Grev. 
Cobo. Petit Bot. Fermain. 
Polysiphonia byssoides, Grev. 
Frequent all round the coast. 
Polysiphonia Brodiaei, Grev. 
Petit Bot. Cobo. Fermain. 
Polysiphonia thuyoides, Harv. (LRytiphloea.) 
Moulin Huet. Fermain. Petit Port. Vazon. 
Polysiphonia fruticulosa, Spreng. (Ay“phdoea.) 
Common, 
‘Dasya venusta, Harv. 
Noted in Miss Le Lievre’s list. 
Dasya arbuscula, C. Ag. 
Fermain. Bec du Nez. Cobo. 
Dasya coccinea, C. Ag. 
Rather common. 
Sphondylothamnion multifidum, Nag. (Wvangelia.) 
Here and there all round the coast. 
Spermothamnion Turneri, Aresch. (Ca//ithamnion.) 
Rocquaine. Bordeaux. Fermain. Grandes Rocques. 
Ptilothamnion pluma, Thur. (Cadlithamnion.) 
Petit Bot Bay, on washed-up Laminaria stems. 
Griffithsia corallina, C. Ag. 
Rather common. 
Griffithsia setacea, C. Ag. 
Common. 
Halurus equisetifolius, Kutz. (Grifithsza.) 
Cobo. Bordeaux. Lancresse Bay. Frequent on the south coast. 
Bornetia secundiflora, Thur. (Gv?ffithsza.) 
Cobo. Moulin Huet. Rocquaine. Bec du Nez. Fermain. 
Monospora pedicellata, Solier. (Cadllithamnion.) 
Frequent all round the coast. 
Pleonosporium Borreri, Nag. (Cad/ithamnion.) 
Fermain. Petit Port. Bec du Nez. Petit Bot. 
