44 CHECK LIST OF PISHES OP THE DOMINION. 



40. Polyodon spathula Walbaum. 

 Paddlefish. 



Lacustrine and fluviatile. 



Exceedingly rare in Canada — the following appearing to be its records: Lake Huron, near 

 Sarnia, Ontario (two specimens);* Spanish River, District of Sudbury (one specimen); 

 Lake Helen, Nipigon River (one specimen) ; Lake Erie (if from the Canadian side of the 

 lake— one specimen): plentiful in the Mississippi valley and southern United States: 

 also recorded from Ohio River (Le Sueur, 1817, as Platirostra edentula; and Rafinesque, 

 1820, as Acipenser lagenarius) ; and from Lake Ontario (Rafinesque, 1820, as Proceros 

 vittatus) . 



41. Acipenser transmontanus Richardson. 

 White Sturgeon. 



Either anadromous or remaining permanently in fresh water. 



British Columbia: recorded from Pine Island Lake and Saskatchewan River (Richardson, 

 1836): extends from Alaska southward to Monterey, California. 



42. Acipenser medirostris Ayres. 

 Green Sturgeon. 



Frequents the sea or brackish water, seldom entering rivers beyond their mouths. 

 British Columbia: ranges from San Francisco northward: "not common north of the 

 Straits of Fuca" (Jordan and Evermann). 



43. Acipenser sturio oxyrhynchusf Mitchill. (Plate I, figure 3). 

 Common Sturgeon. 



Anadromous — perhaps spawning in brackish as well as in fresh water. 



Maritime Provinces and St. Lawrence River and tributaries: although a coastwise sturgeon 



reported from Manitoba and from northern lakes of the interior (Eigenmann, 1894): 



in the United States ranging from Maine to South Carolina. 



44. Acipenser rubicundus Le Sueur. 

 Lake Sturgeon. 



Lacustrine and fluviatile. 



Provinces of Ontario and Quebec: St. Lawrence River, Lake of the Woods, and Prairie Prov- 

 inces: also recorded from Labrador; Hudson Bay; and Albany River, Rupert Land 

 (Richardson, 1836, as A. rupertianus) : Mississippi and Ohio valleys and tributary 

 waters. 



45. Acipenser brevirostrum Le Sueur. 

 Short-nosed Sturgeon. 



Anadromous: entering the larger rivers and estuaries. 



Recorded from St. Lawrence River and tributaries (Fortin, 1864) : said to range in the United 

 States from Cape Cod to Florida: reported from the coast of Texas. 



*"01d fishermen near Point Edward on the Lambton county shore vaguely refer to other specimens occurring 

 in Lake Huron." Prince. 



■|-This is a sub-species of the common sturgeon (A. sturio) of Europe, from which it chiefly differs in the number 

 and character of the stellate ossifications. 



