BIGELOW: COAST WATER EXPLORATION OF 1913. 285 



The only sedentaria taken in shallow water was dead and very frag- 

 mentary; those from the deep hauls were all alive, and most of them 

 inside their "houses" (Doliolum shells). The atlantica were all free, 

 and alive. Neither was taken on the surface, which agrees with the 

 rarity of Salpae and Doliolum on the surface, in the Gulf Stream 

 (p. 278) at the time of our visit. When Salpae swarm at the surface 

 of the stream, as they occasionally do (1909b), Phronima appears 

 there too. 



COPEPODS.I 



Copepods were by far the most important constituent of the plank- 

 ton in the Gulf of Maine (p. 274), where they were extremely abun- 

 dant; and the hauls revealed a rich copepod plankton over the shelf 

 south of Cape Cod. But on the run west. and south, these little crus- 

 taceans gave way to other organisms (p. 269), the copepods in the 

 hauls south of New York being counted by individuals, instead of by 

 hundreds of cubic centimeters. And in some of the southern hauls, 

 e. g., at Stations 10068, 10069, 10078, no copepods at all were detected, 

 something never experienced in the Gulf of Maine. The geographic 

 occurrence of the various copepods is listed in the following table. 



1 Identified by Dr. C. O. Esterly. 



