LIST OF LABRADOR MARINE ANIMALS. 427 



termedi ate fauna inhabiting the seas of Lab' a lor and Newfoundland. 



A large portion of the polar species have not yet been discovered 

 south of Greenland ; and the following species are characteristic 

 of Labrador and the Banks of Newfoundland : 

 Cyrtodaria siliqua. Machoera nitida. 



Asterias n. sp ? Margarita acuminata. 



Anaperus cigaro. varicosa. 



Orcxda Barthii. Natica flava. 



Terebratclla Labradorensis. Aporrlxais occidentalis. 



Pecten tenuicostatus. Fasciolaria ligata. 



Alasmodonta arcuata. Buccinum cretaceum. 



Mesodesma Jauresii. Fusus ventricosus. 



Ommastrcphes todarus. 



The littoral species of south-eastern Labrador agree well with 

 those of Maine. The two species of Littorina present the same 

 variations, and the Macoma fusca occurs in the same abundance. 

 These three mollusks are replaced in Greenland by representative 

 'species; as regards the latter, Dr. Stimpson has separated this 

 species from Tellina Groenlandica Beck ; and my own speci. 

 mens from Greenland are plainly distinct. The genus Mesodesma, 

 which does not occur in Greenland, is represented by two species 

 in Labrador and the Grand Banks. The fresh water Alasmodonta 

 arcuata, which is so abundant throughout Newfoundland, and in 

 Nova Scotia, New Brunswick, and the eastern half of Maine,which 

 is included in what was formerly called " Acadia," also cha- 

 racterizes this fauna. In the deep water species there is a greater 

 similarity to the polar fauna, but many species of Buccinum and 

 Fusus described from the frozen seas, which have not been found to 

 the southward, show plainly a different fauna adapted to those 

 climatic conditions. Most of the species enumerated in the pre- 

 ceding list extend around Cape Breton to Halifax and the Banks 

 lying off Nova Scotia, and predominate at the mouth of the Bay 

 of Fundy ; but along the coast of Maine they become reduced in 

 size and numbers before reaching the mouth of the Penobscot, 

 The fauna also reappears on St. George's Banks, and very probably 

 on Jeffries Bank, and the occurrence of Eupagurus pubescem* and 

 Cardita borealis, a very abundant Labrador and Greenland shell, off 

 the coast of New Jersey, indicates that the cold arctic current impin- 

 ges upon that coast. How far northward of Newfoundland this fauna 

 extends is not now known. The charts show the existence of an im- 



* Forbes' Natural History of the European seas, p. 53. 



