292 



Both plants are found near the shore to a depth of a few 

 feet only and in rather sheltered localities. Tetrasporangia were 

 found in January. 



St. Croix: Protestant Cay at Christiansted; St. Jan: Cruz Bay. 



Geogr. Distrib.: Mediterranean Sea, Morocco, West Indies, Bermuda. 



Fig. 290. Dipterosiphonia dendritica (Ag.) Falkenb. 

 Part of the thallus showing the ramification. (About 80:1). 



Dipterosiphonia Schmitz et Falkenb. 



1. Dipterosiphouia dendritica (Ag.) Falkenb. 



FALKENBERG, P., Die Rhodomelaceen, 1901, p. 324. 



Hutchinsia dendritica Ag., Systema, p. 146; Species Alg., vol. II, p. 104. 



Polysiphonia dendritica J. Agardh, Species Aig , vol. II, ]>. 3, pag. 916. 



Of this beautiful, small plant a few specimens were found atta- 

 ched to Cladophora fuliginosa. Referring for further details to the 



