PLANKTON OF THE GULF OF MAINE 



351 



Although we have taken Phialidium over the basin as well as near shore, it 

 occurs most regularly within a comparatively short distance of the land, as might 

 be expected of any neritic animal that passes the greater part of the year attached 



Fig. 



-Occurrence of the taydromedusa Phialidium languidium (#) and of floating hydroids (X)- The large symbols 

 mark the swarms of Phialidium; the hatched curve its approximate offshore boundary 



to the bottom in shoal water. There is evidence that Georges Bank and Browns 

 Bank serve as nurseries for it, for we found it on the northwestern part of the former 

 on August 13, 1926. We have no record for it in the southeastern part of the 

 basin or in the Eastern Channel. 

 75898—26 23 



