464 



BULLETIN OF THE BTJBEATJ OF FISHEBIES 



I can give only the briefest of notes on the species of tintinnids concerned, 

 though these are not hard to identify, thanks to J0rgensen's (1899) and Brandt's 

 (1906) beautiful figures. Most of the Gulf of Maine records listed above are based 



Fio. 133.— Distribution of the tintinnid genus Cyttarocylis in February and March, 1920. X, localities where it was, and 

 O, where it was not found. The hatched curve marks its approximate western boundary at the time 



on one form or another of the highly variable Cyttarocylis denticvlafa. This was 

 notably the case for the rich haul off Cape Cod and for the to wings off southern 

 Nova Scotia in July and August, 1914, just mentioned, but the rich catch off Cape 



