EASTERN CANADIAN PLANKTON 



89 



It is evident that the pressing in of the Gulf Stream, which is characteristic of 

 the summer condition, has been accompanied by an obliteration of the stream of 

 individuals of this species, vphich on the first cruise was passing out of the Laurentian 

 channel around the Breton bank and southwestward along the edge of the continent 

 (see fig. 2). This indicates the smallness of the contribution given by the water 

 covering the Newfoundland bank to the mass of water passing southwestward over 

 the Breton and Scotian banks. 



Fig. 2. 



Distribution of T. catharina in July-September, 1915. Arrows indicate 

 directions of currents affecting the distribution. 



Another i-ndividual was taken in September at " Prince " Station 3 in the bay of 

 Fundy. We have taken it in previous years even farther north in the bay, namely, 

 inside Campobello island near Eastport. Bigelow (19M, p. 121 and 1915, p. 301) 

 found it at many points in the gulf of Maine in 1912 and 1913 and also south of cape 

 Cod as far as New York. Whether it breeds as far south as the gulf of Maine or 

 whether the individuals occurring there have all been brought from the Newfoundland 

 banks is a subject for investigation. Our failure to find the larvae at any point except 

 near Newfoundland is perhaps significant. Wright's capture of one at Canso proves, 

 however, that they may survive that far to the south at least occasionally. Its virtual 

 absence from the cold coastal water of the St. Lawrence gulf and the Breton and 



