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MARINE ALG^E OF NANTUCKET. 



Based principally on specimens collected by L. L. Dame in 

 1868, 1869 and 1886, and by F. S. Collins in August, 1878, 

 and July, 1886. Classification and nomenclature according to 

 Prof. Farlow's Manual of the Marine AlgcB of New England. 



CRYPTOPHYCE^E. 



CHROOCOCCUS, Naeg. 

 C. turgidus, Naeg. 

 Common on wood work, etc. 



CLATHBOCYSTIS, Henfrey. 



C. roseo-persicina, Conn. 

 Common on muddy flats, etc. 



SPH^ROZYGA, Ag. 



S. Carmichaelii, Harv. 

 Not uncommon on mud in the harbor. 



SPIRULINA, Turpin. 



S. tenuissima, Kiitz. 

 On wharves, etc. 



OSCILLARIA, Kiitz. 



0. limosa, var. chalybea, Kiitz. 

 0. subuliformis, Harv. 

 0. subtondosa, Farlow. 

 These three species grow together on wharves, etc. 



LYNGBYA, Ag. 



L. aestuarii, Liebmann. 

 Very common on the marshes. 



LEPTOTHRIX, Kiitz. 

 L. rigidula, Kiitz. 



On various algae at Polpis. 



