166 



Vaueheria piloboloides, Thureb. 

 "Undoubtedly in Essex county. It is very abundant !n the salt 

 marshes at Maiden. There are other Vaucherise along the shore, 

 but I do not think the species are definitely settled" (Frank S. 

 Collins, in letter Nov. 24, 1879). 



ZOOSPORE^zK. 



Enteromorpha intestinalis, Link. 



Very common. 

 Enteromorpha compressa, Grev. 



Very common. 

 Enteromorpha clathrata, Grev. 



Frequent. 



TJlva latissima, iiran. (Sea-lettuce; Sea-cabbage.) 

 Very common. This, and sometimes the next, are the plants 

 which so abound in brackish vi'aters along our coast. When 

 decaying in large quantities, the Beggiatose* upon them produce the 

 well known disagreeable smell so familiar to those residing near 

 tide ponds and flats. This may be given as V. lactuca in future 

 works. 



TJlva lactuca, Linn. (Monostroma Grevillei, Le Jolis). 

 Common. Marblehead (Frank S. Collins), Gloucester (Mrs. Bray), 

 etc. 



Cladophora rupestris, Linn. 



Common. 

 Cladophora arcta, Dillw. 



Quite frequent. 

 Cladophora lanosa, Hoth. 



Nahant (Frank S. Collins, Dr. Farlow), also noticed by Mrs. Bray. 

 Cladophora uncialis, Fl. Dan. 



Occasional (Rev. A. B. Hervey, Frank S. Collins). 

 Cladophora glaucesoens, Griff. 



Nahant (Frank S. Collins), also noticed at Magnolia by Mrs. Bray. 



A more southern species, 

 Cladophora flexuosa, Griff. 



Nahant (Frank S. Collins), etc. Occasional. 

 Cladophora refracta, Hoth. 



Marblehead (Frank S. Collins, Rev. A. B. Hervey), Gloucester 



(Mrs. Bray). Southern. 

 Cladophora albida, Suds. 



Gloucester (Mrs. Bray). Southern. 



* A low parasitic alga (see Farlow, Bull. Bussey Inst., Jan., 1877, p. 76). 



