85 

 RHABDONIA, Harv. 



R. tenera, Ag. 



Abundant and luxuriant ; a striking feature of the marine 

 vegetation in summer. 



POLYIDES, Ag. 



P. rotund us, Grev. 

 Siasconset ; not very common. 



GRINNELLIA, Harv. 



G. Americana, Grev. 



Common. The most beautiful sea-weed of southern New 

 England. 



GKACILLARIA, Grev. 



G. multipartita, Ag. 



G. multipartita, Ag., var. angustissima, Harvey. 

 Polpis ; both forms, but both apparently rare. L. L. D. 



CHONDRIOPSIS, J. Ag. 



0. dasyphylla, Ag. 



A specimen from Brant Point in the herbarium of Miss M. A. 

 Booth ; probably not uncommon, though this is the only evi- 

 dence that can now be referred to. 



C. tenuissima, Ag., var. Baileyana, Farlow. 

 Type and variety very common in the bay, on stones and 

 shells near low water mark. 



POLYSIPHCWIA, Grev. 



P. urceolata, Grev., var. formosa, Ag. 



Brant Point, L. L. D. 

 P. Olneyi, Harv. 



(Dr. S. Durkee.) 

 P. Harveyi, Bailey. 

 12 



