1911] Kofoid: Goiiyaulax catenata. 293 



Distribution : Known from the Baltic, and North Sea, the 

 North Atlantic and waters about Greenland. 



Described by Levander (1894a, b) from the winter and spring 

 plankton of the Gulf of Finland with maximum in May ; reported 

 from the Baltic by Cleve (1897), Apstein (1908), Driver (1908), 

 Kraefft (1900), and Lohmann (1908), and by various observers 

 of the International Commission for the Investigation of the Sea 

 (see Ostenfeld, 1906, 1909) ; from the coastal waters of Greenland 

 by Van Ilofifen (1897) ; as rare in the North Atlantic, 66° to 69° 

 N, 53° to 55° W, by Ostenfeld (1899) and by Ostenfeld and 

 Paulsen (1904) as Peridinium sp., aff. P. catenatum as rare at 

 ten stations in the North Atlantic, 59° to 60° N, 13° to 49° W. 



It is plainly a boreal species with preference for neritic, 

 brackish, waters, but occasionally oceanic. 



For papers cited see bibliography of preceding paper. 



Zoological Laboratory, University of California. 

 Transmitted June 13, 1911. 



