FIGURES 19 and 21 



' Fig. 19. A. Ceratium limulus Gourret from station 17. central North Atlantic; B, 

 Ceratium paradoxides Cleve from station 25, Atlantic North Equatorial Current. 



C-H. Ceratium platvcorne Daday. C, from station 93, near Samoa; D and E, from 

 station 25, North Equatorial Current, Atlantic; F, from station 41, between Galapagos Is- 

 lands and Ecuador; G, from station 15, North Atlantic West Wind Drift; H, from station 1 

 off east coast of United States. 



I-K. Ceratium ranipes Cleve. I, from station 47, north of Easter Island; J, from 

 station 48, north of Easter Island (same specimen as in fig. 20); K, from station 30, east 

 of the Caribbean Sea. 



Fig. 21. A, Ceratium ranipes Cleve. From station 16, North Atlantic West Wind 

 Drift. 



B-F. Ceratium macroceros Cleve. B, subspecies gallicum . from station 139, 

 near Hawaii; C, from station 61, southeastern Pacific, possibly the subantarctic subspecies; 

 D, subspecies gallicum from station 128, off west coast of United States; E, same specimen 

 as in D, lower magnification; F, subspecies macroceros from station 10, southeast of 

 Greenland. 



176 



