238 .DE, DICKIE ON AECTIC SPECIES OP ALGiE. 



ECTOCAEPACE^. 



ChcBtbpferis plumosaj Lyngb. Smaller and less branched than 

 British specimens. 



■ Spliacelaria arefica, Harv. This species appears to be not un- 

 common, rooting among stones bet\veen tide-marlvs. It was first 

 described by Professor Harvey, from specimens "without fruitj 

 gathered by Dr. Lyall at Disco Island, on the east side. 



S, cirrhosa^ Ag. A single specimen, growing on Alinfeldtia 

 plicata ; appears identical with the British form, 



Ectocarp'us lilioralis, Harv.*" Common along the shores of the 

 sound. 



Series II. EHODOSPEEME^. 



Ehodomelace^. 



, r 



Odontlialia dentata, Lyngb. Smaller and narrower than the 

 British form, but certainly identical. Eather rare. 



MJiodomela subfusca^ I 

 Frequent. 



PoJysipJionia arctica, J. Ag. Has the general habit of P. ttrce- 

 olata^ but differs in structure, there being seven siphons, while 

 P. urceoJata has four. This species is not unfrequent along the 

 shores, with CalUth amnion Americamim, Ilarv., on the lower sur- 

 face of large boulders, where both are protected from the grind- 

 ing of the ice. 



EnODYMEKIACEJG. 



Etitliora cristata^ J. Ag. Usually small, not exceeding two 

 inches; growing on Halosaccion ramentaceum, 



Bliodijmenia palmata, Grrev. Abundant, large, and often pro- 



liferous. 



CETPTOKEMIACEiE. 



Ahnfeldtia plicatay J. Ag. Abundant. 

 Kallymenia Pennyi. Harv. Usually in deep water. 



The outline varies according to age, young plants being broadly 

 and obtusely lanceolate ; old plants are obovate, gradually taper- 



Agardh to be distinct 



species of that nam:5, wliica hj calU E. flt'm^. 



