THE AMERICAN MIDLAND NATURALIST. 

 DESMERESTIACEAE. 



Desmerestia viridis (Fl. Dan.) Lamx. Common throughout 

 sound. — Jelliffe. 



DICTYOSIPHONACEAE. 



Dictyosiphon foeniculasius (Huds.) Grew Not infrequent 

 along coast. — Jelliffe. 



ECTOCARPACEAE. 



Ectocarpus confervoides (Roth) Le Jolis. C. S. H. — D.S.J. 



Ectocarpus fasciculatus, Harvey. Not infrequent on L. I. 

 —Jelliffe. 



Ectocarpus sittculosis (Dillw.) Ag. Sticks, stones, inner har- 

 bor, C. S. H.— D. S. J. 



Ectocarpus tomentosus Lyngb., C. S. H. — D. S. J. 



Elachistea fucicola (Valley) Fries. Long Island Sound. — 

 N. M. G. 



L&ajthesia difformis (L) Aresch. Occasional on Fucus at 

 Lloyd's Point, L. I.— D. S. J. 



Mesoploia divaricata (Ag.) Kuetz. Common flats inner har- 

 bor, C. S. H.— D. S. J. 



Myrionema vulgare. Thur. L. I. Sound, stone pier, C. S. H. 

 — N. M. G. 



Myriotricha fiUformis. Harv. Tide stream, Center Island 

 growing on Zostera. — G. C. F. 



Pylaiella littoralis (L) Kjell. Inner harbor, inlet on sticks 

 and stones. — D. S. J. and H. H. Y. 



Scytosiphon lomentarlus (Lyngb.) J. Ag. Inner harbor, C. 

 S. H.— D. S. J. and H. H. Y. 



Stilophora rhizoides (Ehrb.) J. Ag. Long Island Sound. — 

 Jelliffe. 



Streblonema reptans (Crouan) Farlow. C. S. H. — D. S. J. 



ENCOELIACEAE. 



Punctaria lattfolia Grev. Common throughout L. I. — Jelliffe. 

 Punctaria plantaginea (Roth) Grev. Not infrequent on L. I. 

 —Jelliffe. 



* Manuscript of this group and of the Rhodophyceae revised by 

 Professor I. F. Lewis of the Marine Biological Laboratory, Woods 

 Hole, Mass., and the University of Virginia to whom my thanks 

 are due. 



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