310 



ycystis /. 

 phyceae. 



Mixed with other Crypto 



• roseo-persicina, Cohn. Abundant on the marshes. 

 Sphcerozyga Cannichcelii, Harv. Common on muddy flats, and 



in shallow pools in the marshes. 

 Spirulma temdssima^ Kiitz. In small quantity, mixed with Os- 



cillarias^ etc. 



Oscillaria suhitliformis, Harv. Mixed with other Cryptophyceae. 



O. siibtoridosa (Breb.), Farlow; With the preceding species. 



Microcoleiis chthonoplastes, Thuret. On the marshes, mixed with 

 other algae. 



Lyngbya majuscida, Harv. Not uncommon, floating. 



L. cestuarii, Liebm. Common on marshes, etc, 



L. tenerrima, Thuret. In small quantity, among other algae. 



Calothrix confervicola, Ag. On various algse. 



C. Crustacea (Schous.), Born., et Thur. On various algae, fre- 

 quently mixed with the preceding, 



C. scopnlorum, Ag. On woodwork, etc. 



C. pulvinata, Ag. Common on piles of wharves and bridges. 



Rividaria hospita^ Thuret. On an oyster shell. 



Isactis plana. Thuret. On shells. 



Mo7iostroma crepidhiiim^ Farlow. On woodwork in a tidal creek. 



•Ulva Lactiica (L.), Le Jolis. Common, including var. rigida, Le 

 Jolis, and var. latissinia, Le Jolis. 



U. enteromorpha, Le Jolis. Very common, including var, lance- 

 data, Le Jolis, var. intcstinalis, Le Jolis, var, conipressa, Le 

 Jolis. 



U. clathrata, Ag. Common, includinc: var. ramidosa, and var. 



erecta, Le Jolis. 



U. Hopkirkii (McCalla), Harv. Not very common. 



U. marginata, Le Jolis. Not very common. 



U. percnrsa, Ag. Rather common in tide-pools, mixed with 

 other algae, from which it is hardly distinguishable except by 

 microscopic examination. 



U. aureola, Ag, Not uncommon on woodwork. 



Ulothrix Jlacca (Dillvv.), Thuret. 



U. isogona, Thuret. These two species not uncommon on wood- 

 work and other algae. A very slender form grows on Bos- 



