82 



FLORIDEJE. 



TRENTEPOHLIA, Prings. 



T. virgatula, Farlow. 

 Forming a fine fringe on Zostera and the smaller algae. 



POEPHYRA, Ag. 



P. laciniata, Ag. 

 On wharves. 



GONIOTRICHUM, Kiitz. 



G. elegans, Zanard. 

 Polpis, scarce. 



HILDENBRANTIA, Nardo. 



H. rosea, Kiitz. 



Common on pebbles, forming a thin red or reddish-brown 

 film. 



SPERMOTHAMNION, Aresch. 



S. Turneri, Aresch. 



Washed ashore from deep water in great abundance in July 

 and August, especially at Siasconset ; also found growing on 

 Cystoclonium, Rhabdonia, etc. 



CALLITHAMNION, Lyng. 



C. membranaceum, Magnus. 



A very minute alga growing in the tubes of Sertularias and 



other zoophytes, to which it gives a reddish color. Spring 



and early summer ; Siasconset. 

 C. cruciatum, Ag. 



Siasconset, generally growing on Spermothamnion. 



W. A. Spinney, L. L. Dame. 

 0. Borreri, Ag. 

 0. tetragonum, Ag. 

 C. Baileyi, Harv. 



