159 



Polysiphonia nigrescens, Grev. 



Frequent. 

 Polysiphonia fastigiata, Cfrev. 



Common. 



Rhodomela subfusca, Ag. 



Little Nahant (Dr. Earlow, in herb. P. A. S.). "Common from 



Boston northwa'rd " (memo. Dr. Farlow). 

 Var. gracilis. 



Swampscott (Frank S. Collins), Gloucester (Mrs. A. L. Davis, 



Mrs. Bray). 

 Var. Eochei. 



Salem (in herb. P. A. S.), Gloucester (Mrs. Bray). 



SPHLaEROCOCCOrDE^aE. 



Delesseria sinuosa, Lmx. 



Frequent. 

 Delesseria alata, Lmx. 



Nahant, northward. Frequent. 

 Delesseria angustissima, Griff. 



Gloucester (Dr. Farlow's list, Mrs. Bray, etc.). 



Calliblepharis ciliata, KUtz. 

 Gloucester (Frank S. Collins), northward. 



Gracilaria nmltipartita, Ag. 

 East coast (Dr. Farlow's list). 



Corallina o£S.ciualis, L. 



Common. 



Melotaesia membranacea, Lmx. 



Frequent (Rev. A. B. Hervey, Frank S. Collins). 

 Melobesia Lejolisii, Bosanoff. 



Common at Nahant (Frank S. Collins). Recently separated from 



the last. This is the common species on eel-grass. 

 Melobesia farinosa, Lmx. 



East coast (Dr. Farlow's list) ; Marblehead (Rev. A. B. Hervey). 

 Melobesia pustulata, Lmx. 



Frequent (Frank S. Collins). 



Llthothamnion polymorphum, Aresch. 

 Frequent (Frank S. Collins). Northern. 



Hildenbrandtia rosea, Kiits. 

 Dredged along the coast, growing on stones; "everywhere be- 

 tween tide marks " (memo. Dr. Farlow). 



