In Carboniferous and Permian Epochs 169 



In a paper by Hussakof — likewise published in the 

 series of the Carnegie Institution (/2j) — "On the Per- 

 mian Fishes of North America," but further by statement 

 and table, that author makes a helpful comparison with 

 the fis-h-fauna of Bohemia. 



Hussakof then says: "while the groups represented in 

 the two are, with the exception of the Acanthodii, the 

 same, there is a marked difference in the genera respec- 

 tively represented, proving the long segregation of the 

 two stocks from which the Permian faunas of the two 

 localities are descended. The most remarkable difference 

 between the faunas is the presence of Acanthodii (three 

 genera) in Bohemia, and their absence in Texas." So the 

 closing remark of Case is well illustrated by such dis- 

 tributional details: "The presence of a great North 

 Atlantic continent in Carboniferous and earlier times is 

 accepted as a proved fact by all the writers on the subject, 

 and need not be defended here." He might quite appropri- 

 ately have added further: "Connection of it also with a 

 great North-East European, Indian, and Australian land- 

 mass is strongly suggested." 



