202 THE CANADIAN NATURALIST. [Vol. X. 



River they attain a greater elevation than elsewhere in the dis- 

 trict, rising to a height of nearly 100 feet above sea level. Their 

 vertical distribution, however, must exceed this considerably, for 

 in many places they are seen sloping down beneath the waters of 

 the Bay, as for instance, at Charlo and Jacquet Rivers, and the 

 mouth of the Great Cascapedia, where a tough blue or blackish 

 clay is exposed at ebb-tides, enclosing fossils in abundance. 



The marine fauna embedded in the Leda clays of the Baie de 

 Chaleur is largely of an arctic type. Some years ago I made a 

 collection of shells from these beds, which was submitted to my 

 friend Mr. Geo. F. Matthew, of St. John, who published a list of 

 them in one or two papers relating to the Post-Pliocene of the 

 Bay of Fundy region.^ I here reproduce the list: 



Sazicava riigosa, Linn. 



" var. arctica ; abundant. 



Mya truncata, Linn ; scarce. 



" var. UddevaUensis ; common. 



M. arenarioj Linn. 



" var. acuta, Say ; abundant. 



Macoma calcarea, Chemnitz. 

 M. Gr(enla7idica, Beck ; common. 

 Serripes Grocnlandicus, Chemnitz. 

 Kellia suborhicularis, Montagu ; rare. 

 Mytilus edulis, Linn ; scarce. 



" var. elegans ; common at Benjamin River and 



Black Point. 

 Nucula ezpansa, Reeve ; very rare. 

 N. tenuis, Montagu ; common. 

 Leda pernula, MuUer, var. baccata : very plentifuL 



" var. tenuisulcata. 



L. minuta. Fabricius, var. caudata. 

 Portlandia glacialis, Gray. =zLeda truncata, Brown ; not common 



except at Jacquet River. 

 Yoldia sapotilla, Gould. 

 Bela harpularia, Couthuoy. 

 B. turricula, Montagu ; common. 

 Natica affinis, Ginelin,:=A^. clausa ; abundant. 

 Lunatia heros, Say. 



" var. Chalmersi, Matthew ; rare. 



Buccinum Groenlandicum, Chemnitz ? 

 B. tenue, Gray. 



* Canadian Naturalist, Vol. VIII, No. 2 ; also in an article on the 

 Superficial Geology of Southern New Brunswick, Report of Progress, 

 Geological Survey of Canada, 1877-78. 



