174 THE CANADIAN NATURALIST. [June 



Wliiteaves almost equal in quantity those in the deeper Atlantic 

 soundino'S. 



In the estuary of the St. Lawrence itself, Bulimina pyrula be- 

 comes a somewhat common form. Among' forms which in the 

 Gulf of St. Lawrence may be mentioned as specially characteristic 

 of deep water, are Nodosaria (Glandulina) h:evi,c!;ata, Globigerina 

 bulloides, very small ; Bulimina, principally B. squamosa, also 

 small ; Uvigerina pygmcea, Cassidulina. 



From depths greater than 100 fathoms all the Foraminifera are 

 very small and delicate ; and Lagenidas, Baliminidre, Globigerina 

 bulloides, together with a few depauperated Nonioninse, constitute 

 the greater part of the fauna. From these depths also come many 

 Diatoms, mostly Coscinodiscus, and Sponge spicules. Polysto- 

 mella striatopunctata is almost everywhere prevalent, though it 

 nowhere attains to any very great size, and below about 30 

 fathoms, becomes small and generally rare, and continues increas- 

 ing in rarity till it almost disappears at 300 flithoms. In some 

 localities, at about 30 fathoms, P. Arctica is abundant, and greatly 

 surpasses in size the ordinary Polystomella^ occurring along with 

 it. The remaining P. striatopunctata) also at tliis depth often 

 show a remarkable proneness to run into modifications resembling- 

 one or other of the numerous species and varieties into which the 

 genus is silbdivided, but as the transition series are complete, it 

 is very difficult to place the bulk of the specimens satisfactorily 

 under them. It has been thought better in the table to include 

 as many as are easily seen to be modified striatopunctata3 under 

 that name. Nonionina Labradorica, though not so universally 

 distributed as the above, is a very characteristic species in the 

 Gulf. It seems to be best developed and in largest numbers at 

 about 30 fathoms. It thins off both in numbers and size as we 

 go into shallower water, and decreases much in size, though not 

 so perceptibly in numbers as the water deepens to 100 fathoms 

 and below. There is a remarkable absence of Miliolas in the 

 estuarine parts of the Gulf, which strongly contrasts with their 

 abundance in Gaspe Bay, and also on the Atlantic coast of Nova 

 Scotia, and south. 



One specimen of a curious sandy form of Cornuspira foliacea 

 was obtained at a depth of 18 fathoms at Gaspe. 



Biloculina ringens scarcely occurs above 30 fathoms. 



At Murray Bay, which is only about GO miles below the point 

 where, at least, the surface of the St. Lawrence becomes perma- 



