CANADIAN FISHERIES EXPEDITION, 19U-15 485 



two groups of species being mixed and the deep forms found near the surface. The 

 chief large areas of this kind are along the Laurentian channel from Cabot strait out 

 to some distance beyond the edge of the continental shelf, the central portion of the 

 Scotian bank, and the -Bay of Fundy. 



The typical northern coastal water, as we have described it, has been found by 

 Dawson generally in the gulf of St. Lawrence, along the outer coast of Nova Scotia 

 and around the southeastern corner of Newfoundland. The Albatross records show 

 that it was present in July, 1885, on the banks off cape Race, on the Breton bank and 

 along the Nova Scotia shore. Bigelow's results show it in the mouth of the Bay of 

 Fundy, and Copeland's account demonstrates its presence at the bottom in Passama- 

 quoddy bay, as at Prince station 4. This is in entire accord with the distribution of 

 S. elegans. 



In the Southern Coastal zone there are no Chaetognaths or merely small S. elegans. 

 It is scarcely distinct from the northern coastal and might be taken to include the 

 surface layers of the latter. This would give it a salinity of less than 3lVi»o and a 

 summer temperature of from 10° to 20° C, although a somewhat higher salinitj^ would 

 not be excluded. It occurs typically in the Magdalen bay, particularly toward the 

 south. Elsewhere it is not so typical and grades into the northern coastal water. The 

 surface waters generally over the continental shelf approximate to the southern coastal 

 type, except in the Bay of Fundy where the heavy tides increase the surface salinity 

 and lower the temperature. As a result of this there is a virtual absence of small 

 S. elegans in the Bay of Fundy. 



The movements of this water are not indicated by the Chaetognaths, but it will 

 be carried out of the gulf by the Cape Breton current, and perhaps also to a slight 

 extent through the Gut of Canso. It arises by a mixture of the river water with the 

 northern coastal, and is dissipated by mixture with the latter and with the boreal 

 oceanic. 



