86 NATURAL SCIENCE [Febmary 



its genus hitherto discovered, and seems to belong to the same group 

 of shark-like fishes as Psammosteiis, from the European Devonian, 

 and Oracanthus, from the British and American Lower Carbon- 

 iferous. Dr Lindahl, it may be remembered, succeeded A. H. 

 Worthen as State-geologist of Illinois, but was turned out in con- 

 sequence of political changes, to the great loss of the State. We 

 are glad to find that he now has a position as Director of the 

 Museum of the Cincinnati Society, 312 Broadway, Cincinnati, O. 



