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Ectocarpus firmus, 4g. (E. littoralis, Harv.) 
Rockport (in herb. P. A. S.), and elsewhere (Rev. A. B. Hervey, 
Frank S. Collins). 
Ectocarpus Farlowii, Thuret. 
Marblehead, northward (Dr. Farlow’s list, Mrs. Bray, and Rev. A. 
B. Hervey). 
Ectocarpus siliculosus, Lyngb. 
Frequent. 
Ectocarpus viridis, Harv. 
Quite frequent. 
Ectocarpus tomentosus, Lyngb. 
From Boston, northward; not very frequent. 
Ectocarpus fasciculatus, Harv. 
Frequent. 
Ectocarpus granulosus, Ag. 
Boston harbor (Dr. Farlow’s list), also noticed by Rev. A. B. 
Hervey. 
Ectocarpus Durkeei, Harv. 
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 feeniculaceus, rev. 
Frequent. 
Desmarestia aculeata, Lmz. 
Common. 
Desmarestia viridis, Linz. 
Common. 
Punctaria latifolia, Grev. 
Frequent. 
Var. Zosteree, Le Jolis. (P. tenuissima, Harv.) 
Gloucester (Mrs. Bray). Common at Lynn beach in early spring 
(Frank S. Collins). 
Punctaria plantaginea, Grev. 
Frequent. 
Phyllitis Fascia, Aiz. (Laminaria Fascia, Ag.) 
Common. 
Scytosiphon lomentarius, Ag. (Chorda lomentaria, Lyngb.) 
Quite common. 
CHLOROSPOR_ZE. 
SIPHONE 4. 
Bryopsis plumosa, Lz. 
Common. 
