164 
Ralfsia verrucosa, Aresch. 
Frequent from Nahant, northward. 
Ralfsia clavata, Crouan. 
Swampscott; Malden marshes, southern limit (Frank §S. Collins). 
Rare. Common, northward (memo. Dr. Farlow). 
Chorda filum, Stack. 
Common. 
Chordaria flagelliformis, Ag. 
Frequent. 
Chordaria divaricata, Ag. 
Swampscott (Rev. A. B. Hervey), Gloucester (Mrs. Bray), north 
side of Cape Ann (Dr. Farlow), southward to New York. 
Castagnea virescens, Thuret. (Mesogloia virescens, Harv., Ner. 
Am. Bor.) 
Frequent at Gloucester, etc. 
Castagnea Zosteree, Thuret. (Mesogloia Zostere, Harv., Ner. 
Am. Bor.) 
Gloucester (Frank §. Collins, Mrs. Bray), Wood’s Hole (Dr. Far- 
low’s list). 
Leathesia tuberiformis, Gray. 
Frequent. 
Elachista fucicola, fr. 
Frequent. 
Myrionema strangulans, Grev. 
Essex county waters (Rev. A. B. Hervey, Frank S. Collins). 
Cladostephus spongiosus, Ag. 
Gloucester, etc. (Mrs. Bray). 
fladostephus verticillatus, Ag. 
Occasional (Rev. A. B. Hervey, Mrs. Bray). 
Sphacelaria radicans, Ag. 
Nahant (Dr. Farlow), Gloucester, etc. (Mrs. Bray, Rev. A. B. 
Hervey). 
Sphacelaria cirrhosa, Ag. 
New York, northward (Dr. Farlow’s list), Gloucester (Mrs. Bray). 
Ectocarpus spheerophorus, Carm. 
‘‘Nahant. I found a very small quantity of this last summer — 
(4879), and it is, I believe, all that has been found in this country’’ 
(Frank S. Collins, in letter Nov. 24, 1879). 
Ectocarpus brachiatus, Harv. 
Boston, northward (Dr. Farlow’s list), also reported in county 
waters (Rev. A. B. Hervey), but Dr. Farlow now considers this as 
doubtful. 
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