426 LIST OF LABRADOR MARINE ANIMALS. 



Leda limatula. Crepidula plana. 



Mytilus plicatulus, " fornicata. 



■Venus mercenaria. Rlssoa minuta. 



Lyonsia hyalina. Natica heros. 



Ostraza virginiana, " triseriafa. 



Nassa trivittata. 



Mr. Bell observes that Natica heros is "large and abundant." 

 Mytilus plica tulus and Venus mercenaria were " from the Gulf.". 

 The last mentioned species occurs abundantly in Casco Bay- 

 Eupa gurus Bernhardus, which does not occur in Labrador, was fre- 

 quent. Aporrhais occidentalis occurred very rarely at Gaspd, as 

 it does on the coast of Maine. 



The occurrence of the large long oyster so common at Prince 

 Edward's Island, and which is found in such immense heaps at 

 Newcastle, Me., upon the'banks of the Sheepscot River, in whose 

 waters it still lives, though indiminshed numbers, indicates similar 

 oceanic conditions existing on those two shores, which are sepa- 

 rated by the colder waters of tha Bay of Fundy. 



The occurrence of Astrophyton Agassizii at Gaspe", which is re- 

 placed in Labrador by A. eucnemis, is interesting as showing 

 that the echinoderm faunae of those localities are also distinct. 

 The island of Anticosti, judging by its land shells and vegetation 

 and the presence of Idyia roseola, Bolina alata, and Pleuro- 

 brachia rhododactyla, belongs to New Brunswick. 



This fauna was stated by Dr. Gould to extend from Cape Cod 

 to the Newfoundland Banks from the study of the mollusca alone. 

 It was afterwards, by Forbes, termed the " Boreal " province, and 

 he considered Cape Breton its most northern limit. 



In 1852, Dana* established under the name of the "Nova 

 Scotian Province," a crustacean fauna, embracing an extent of nine 

 hundred miles, reaching from " Cape Cod to the Eastern Cape of 

 Newfoundland ;'■ and in 1857, Liitken f likewise proposed for the 

 same region an echinoderm fauna, which he calls the " Acadiske 

 Provinds," merely changing Dana's name for the more ancient 

 title of that Province. 



They all agree in bringing down the Arctic or polar fauna to 

 intermingle with the Acadian fauna at the northern limits of the 

 latter. But with a better knowledge of the polar fauna, which is pre- 

 sented in the lists of Greenland invertebrates by Reinhart, Morch, 

 Liitken, and others,J we are led to the conclusion that there is an in- 



* Crustacea of the U. S. Exploring Expedition. 

 t Uebersicht iiber Gronland's Echinodermata. 



