Bull. U. S. B. F., 1924. (Doc. 968.) 
Fig. 125. — Phytoplankton south of Marthas Vineyard, August, 1914 (station 10258), dominated by the 
diatom Khizosolenia semispina. X 150. (See list, p. 431.) 
Fig, 126. — Midwinter phytoplankton in the inner part of Massachusetts Bay (station 10488, December, 1920), 
dominated by the diatom genus Coscinodiscus, with Chaetoceras, the peridinian Ceratium longipes, and miero- 
copepods. X 40 
