No. 484] DISTRIBUTION OF CH.ETOGNATHS 



245 



lata, occur in the Atlantic, ten in the Indo-Austral, eight in Jap- 

 anese waters, and two in the siibantarctic, in the e[)iplankton. In 

 the mesoplankton of the i\.tlantic eight species are found, and 

 three in the Indo-Austral. In the hiru'cr ocoirrapliical rcLn'ons 

 of the Atlantic we find coincidently in ilic cpiplankton, in tlu- 

 Arctic, three species, in the subarctic five, in the north KMupcratc, 

 eight, in the tropical, five, in the soutii temperate, four; in the 



TEMPERATURE IN DEGREES CENTIGRADE 



