80 



E. fasciculatus, Harv. 

 Brant Point, L. L. D. 



B. littoralis, Lyngb. 

 Harbor, common. 



E. Mitchellae, Harv. 



This species was founded on specimens collected by Miss Anne 

 Mitchell, (Mrs. Alfred Macy,) and is known only by the de- 

 scription and plate in Harvey's Nereis Boreali- Americana. 



SPHACELAEIA, Lyngb. 



S. cirrhosa, Ag. 



Common on larger algae. 



CLADOSTEPHUS, Ag. 



C. verticillatus, Ag. 



Siasconset, cast up from deep water. L. L D. 



ELACHISTEA, Duby. 



E. fucicola, Fries. 

 Polpis, on Fucus. 



MTRIACTIS, Kiitz. 



M. pulvinata, Kiitz., var. minor, Farlow. 

 A minute parasite in the cryptostomata of Sargassum. Brant 

 Point. 



MESOGLOIA, Ag. 



M. divaricata, Kiitz. 



Common ; very different in appearance at different stages of 

 growth. 



RALFSIA, Berkeley. 



R. clavata, Crowan. 



On shells, etc., forming a thin brownish or blackish film. 

 Polpis. 



