No. 4]. DAWSON — POST-PLIOCENE. 373 



Myriozoum suh-gi'acile, DOrbigny. 

 Fossil — Rivi^re-du-Loup. 

 Recent — Labrador (Packard) ; Gasp^. 



Idmonea atlantica, Forbes. 



Fossil — Rivi^re-du-Loup. 



Recent — I believe this to be identical with a species found in 

 the Gulf of St. Lawrence, and referred by Dr. Packard and Mr. 

 Whiteaves to the above. 



Crisia ehurnea, Ellis. 



Fossil — Montreal. A specimen collected by Mr. Curry is 

 referred to this species by Mr. Whiteaves. 



Recent — Labrador (Packard). In 96 fathoms, Trinity Bay, 

 N. Shore St. Lawrence R. J. F. W. 



Alecfo, sp. 



Fossil — Riviere-du-Loup. 



Memhranipora Lacroixii, Busk. 



Fossil — Riviere-du-Loup. 



Recent — Gasp^ ; Labrador (Packard). 



Entirely agrees with recent examples from Gulf of St. Law- 

 rence. One of the six forms referred by Smitt to M. lineata 

 Linn. (J. F. W.) 



Memhranipora lineata^ Linn. 

 Fossil — Riviere-du-Loup. 

 Recent — Gaspe. 



DiscoporeUa hispida, Johnston. 



Fossil — Riviere-du-Loup. Patches on shells, somewhat worn, 

 but referable to this common North Atlantic species. 



Sub- Class II. — BracJilopoda. 



Rhynchonella psittacea^ Gm. 



Fossil — Montreal; Beauport; Riviere-du-Loup, Abundant. 



Recent — Murray Bay and Gaspe. Abundant. Labrador 

 (Packard) ; Gulf St. Lawrence. Generally on stony bottoms 10 

 fathoms and over. Arctic seas generally ; also Crag of England 

 and glacial beds. 



In a bed of stony clay at Riviere-du-Loup, this shell is very 

 abundant, with less abundant specimens of the next species. It 

 occurs living in precisely the same relations and in great abund- 

 ance at Murray Bay, in about 20 fathoms. 



