PLANKTON OF THE WOODS HOLE REGION 169 
Fic 72.—Occurrence of Ammodytes americanus during 
successive years, 1893 to 1907 
Fic. 70.—Occurrence of Tau- 
toga onitis during succes- 
Sive years, 1893 to 1907 
Fic. 71.—Occurrence of Myorocephalus zxneus during 
successive years, 1893 to 1907 
Fic. 73.—Occurrence of Pollachius 
virens during successive years, 1893 
to 1907 
8242°—25}——_6 
