IV. POLYZOON, BRACHIOPODS, AND LAMELLIBRANCHIATES 



(Post-pliocene — Canada. ) 



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Lcpralia ijuadricornuta, Montreal (magnified). 

 Rhynchonella psittacea, Riviere-du-Loup. 

 Terebratella Spitzbergensis^ Riviere-du-Loup. 

 Alya truncata—\d.x. Uddn'allensis — Montreal. 

 Mya truncata — Var. communis — Portland. 

 Patiopca Non'gica, Riviere-du-Loup. 

 Saxicava rugosa — Var. Arctua — Montreal. 

 Astarie Laurentiana, Montreal. 



