165 



Ectocarpus flrmus, Ag. (E. littoralis, Ilan.) 4 



Eockport (in herb. P. A. S.), and elsewhere (Rev. A. B. Hervey, 



Frank S. Collins). 

 Eotooarpus Farlowii, Thuret. 



Marblehead, northward (Dr. Farlow's list, Mrs. Bray, and Eev. A. 



B. Hervey). 

 Ectocarpus siliculosus, Lyngb. 



Frequent. 

 Ectocarpus viridis, Han. 



Quite frequent. 

 Ectocarpus tomentosus, Lyngb. 



From Boston, northward; not very frequent. 

 Ectocarpus fasciculatus, Sarv. 



Frequent. 

 Ectocarpus granulosus, Ag. 



Boston harbor (Dr. Farlow's list), also noticed by Kev. A. B. 



Hervey. 

 Ectocarpus Durkeei, Saw. 



Portsmouth, N. H. (Dr. Farlow's list). This species ought to be 



found in Essex county. It is probably only a form of the preceding 



species (memo. Dr. Farlow). , 



Dictyosiphon fcenieulaeeus, Gi-ev. 

 Frequent. 



Desmarestia aculeata, Lmx. 



Common. 

 Desmarestia viridis, Lmx. 



Common. 



Punctaria latifolia, 6rev. 



Frequent. 

 Var. Zosterse, Le Jolis. (P. tenuissima, Harv.^ 



Gloucester (Mrs. Bray). Common at Lynn beach in early spring 



(Frank S. Collins). 

 Punctaria plantaginea, Qrcv. 



Frequent. 



Phyllitis Fascia, Ktz. (Laminaria Fascia, Ag.') 

 Common. 



Scytosiphon lomentarius, Ag. (Chorda lomentaria, Lyngb.") 

 Quite common. 



CJEILOKOSPOR^. 



SIPHONTE.^:. 



Bryopsis plumosa, Lmx. 

 Common. 



