BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 475 



(5), the Ulva, Enter omorpha, and Monostroma associations (6), the Ulolhrix associations 

 (7), the Phyllitis and Scytosiphon associations (15), the Fucus and Ascophyllum associa- 

 tions (25), the Bangia association (27), the Porphyra association (28), the Nemalion 

 association (30). 



THE PLANKTON. 



The only studies on the plant life present in the plankton of the region covered by 

 the survey have been those of Peck (1894 and 1896), chiefly in relation to its value as a 

 source of food, especially for the menhaden. In his second paper Peck (1896, p. 356) 

 records his observations on the plankton of Buzzards Bay, describing and figuring a num- 

 ber of microorganisms belonging to the Peridinales and Bacillariales (Diatomales) , 

 together with animal forms. His studies were quantitative rather than qualitative, 

 and the identification of his material as regards plant life was only partial, but it is 

 clear that the plankton of these regions is very abundant and widespread, as would be 

 expected of warm, shallow bodies of water. 



