S. rhizodes, Ag. 

 Polpis. 



81 

 STILOPHOBA, Ag. 



CHORDA, Stack. 



C. filum, L. 

 Rather common in the harbor. 



LAMINARIA, Lamour. 



L. saccharina, Lamour. DEVIL'S APRON. KELP. 

 L. saccharina, Lamour, var. caperata, Farlow. 

 Type and variety common at Siasconset. 



OOSPORE^:. 



Fucus, L. 



F. vesiculosus, L. BLADDER-WRACK. BOCK-WEED. 

 Common. 



ASCOPHTLLUM, Stack. 



A. nodosum, Le Jolis. 

 Common. 



SARGASSUM, Ag. GULF-WEED. 



S. vulgare, Ag. 



S. vulgare, Ag., var. Montagnei, Farlow. 

 Type and variety common, 



A large bank of Sargassum bacciferum, Ag. , the species form- 

 ing the great "Sargasso Sea" in the Atlantic, is reported to 

 exist not far from the island ; it is quite possible, as a bit 

 washed ashore at East Falmouth on the main land has been 

 picked up, and collectors may yet find specimens on the Nan- 

 tucket beaches. 



