32 Post-Plioccjie Deposits of the St. Lawrence, 



The Diatomacere associated with these shells include Coscino- 

 discus lineatus and species of Galliondla, Eunotia, Cocconeis and 

 Achncmthes, most of them apparently identical with forms figured 

 bv Bailey. There are also minute acicular spicula of sponges. 



Since the highest points at which raised beaches have been 

 found in Canada scarcely reach an elevation of 80 fathoms above 

 the sea level, we can scarcely expect to find on the present land 

 evidence of depths equal to those represented by these soundings. 

 Their containing distinct species from those in the tertiary clays 

 is, however, an interesting fact, and I figure these as a guide to 

 collectors who may be so fortunate as to fij.;d them in a fossil state. 



(3.) Species of Bryozoa. 



stones 

 From the abundance of the remains of these creatures on 



at the surface of the boulder clay at Beauport, I have no doubt 

 that a number of species might reward a diligent search. My 

 time however at th.s locality was very limited, and although I 

 brought thence single pebbles with as many as four or five species 

 attached to them, I have no doubt that my collection includes 

 only a small fraction of the species occurring there. The speci- 

 mens are also in many instances in a defective state of preserva- 

 tion ; and as collectors of these objects well know, even in recent 

 specimens it is often very difficult to determine species from the 

 dead cells alone. I am therefore able to name at present only a 

 few species, but these, I trust, may be relied on with some cer- 

 tainty. 



1. Hijrpothoa catcnularia, Fleming. (Fig. 12.) — This pretty 

 little organism spreads its chains of cells over the tertiary pebbles 

 at Beauport. just as is now does in the Gulf of St. Lawrence ; and 

 being of a dense and strong texture, is remarkably well preserved. 

 It belongs at present to the Laminarian and Coralline zones, and 

 is found abundantly in Gaspe Bay in nine fathoms. 



2. Hlppotlioa divuricata, Lamour. (Fig. 13.) — This smaller 

 and more delicate species is very abundant at Beauport ; but 

 from its minuteness and its similarity in color to the grey, weath- 

 ered pebbles, may easily escape observation. It differs from the 

 typical form of the species in having the cells united to each other 

 directly, instead of by a slender calcareous thread ; but as John- 

 ston* mentions this as sometimes occurring in recent specimens 



