206 G. M. Dawson — Fararainifera frmn the 



also come many Diatoms, mostly Coscinodiscus, and Sponge 

 spicules. Polystomella 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 increasing in rarity till it almost disappears at 300 

 fathoms. In some localities, at about 30 fathoms, P. Arctim is 

 abundant, and greatly surpasses in size the ordinary Folysto- 

 raellce occurring along with it The remaining P. striatopunc- 

 tatce also at this depth often show a remarkable proneness to 

 run into modifications resembling one or other of the numeroiif 

 species and varieties into which the genus is subdivided, but as 

 the transition series are complete, it is very difficult to place 

 the bulk of the specimens satisfactorily under them. It ba? 

 been thought better in the table to include as many as are easiiv 

 seen to be modified strialojmnctatcB under that name, ^omo- 

 niiia 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 perceptibl} 

 and below 

 ^_^^^^^^^^^ c^.^^^.,^^ V.1 x,^...v.xcv^ ... .... „„tuarine parts 



of the Gulf, which strongly contrasts with their abundance m 

 Gaspe Bay, and also on the Atlantic coast of Nova Scotia, ana 



One specimen of a curious sandy form of Oyrnuspira foUc^ 

 was obtained at a depth of 18 fathoms at Gaspe. 



Biloculina ringens scarcely occurs above 30 fathoms. . 



At Murray Bay, which is only about 60 miles below the point 

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

 nently fresh, the Foraminifera become very scarce and po ■ 

 Polysiomelh. striatopunctata is the most common, but it - 

 become very small. Noniomna Labradorica, I^^'^ola tanant 

 sis and Trochammina inflata also occur, but all much reciuc 

 in size, and scarce relatively to the amount of material examineo. 

 On passing from the Gulf to the east of Kewfoundlana, o .^ 

 the south of Cape Breton, a change from the Gulf ^aun<* ^ 

 immediately detected. Polystomella striatopunctata, ^^^^^ ^^, 

 common, becomes rare. Nonionina Lahradori^a to a ^^,.^^ 

 tent ceases to appear, and Uvigerina pygmcea and Cassias 

 become more frequent , /n^c 1 



The arenaceous HippocrepinaA^g. ^^^ ^^i^'^Z'^^ 

 and 3) are most plentiful at depths less than 20 iatfio ^ 

 Lituola scorpiurus (fig. 4) goes down to the greatest <iep .^. 

 Gasp^ Bay, and is yet abundant at 10 fathoms, while ii^^^j 

 mense Ehabdopleura aiyysscyrum (fig. 6) appears only a^ 



