88 



DEPARTMENT OF THE NAVAL SERVICE 



"Thirty-three" Station 64 in St. George bay. It has ahnost disappeared from the 

 Laurentian channel outside the strait. One individual was obtained at " Acadia " 

 Station 86 in the middle of the channel. 



Fig. 1. 



Distribution of T. catharina in May-June, 1915. Arrows indicate supposed 

 directions of drift. 



In the northern part of the gulf a single individual was taken at '' Princess " 

 Station 42. It might be thought that this had been carried in through Cabot strait. 

 If this were so, it would be expected also at " Princess " Stations 43 and 44, and none 

 were obtained. It is as likely that it has entered the gulf through the strait of Belle 

 Isle. Captain Chalifour of the Princess informed me that in July, 1915, he met exten-. 

 sive ice floes well inside the strait of Belle Isle. These will have been driven in by 

 northeast winds. If the Tomopteiis had in thnt way been brought into the Esquimau 

 channel, the current which Dawson has demonstrated on the northwest side of the 

 channel, would carry it direct to ''Princess" Station 42. Certain arctic medusae 

 show a similar distribution in the northern part of the gulf; for example, Mertensta, 

 Catahlema and Aeginopsis. ^ ^ ^^ 



A single specimen was taken on the Scotian bank off Halifax at Acadia 

 Station 50. This had probably been brought to this point by the coastal tongue out- 

 side Sable Island bank, which was so distinct in the May- June cruise. 



