No. 412.] REVIEWS OF RECENT LITERATURE. 331 
but every bit of additional evidence is welcomed. It all tends to 
show that in the time of the uppermost Coal Measures the great 
western ocean had extensions as far as the Mississippi valley on 
the one side, and to eastern Russia on the other, since the brachio- 
pod, gastropod, and cephalopod faunas of the two regions have many 
species in common. Dr. Jakolew also announces the publication, 
in the near future, by Professor Tschernyschew, of an extensive 
work on the brachiopod faunas of the Upper Carboniferous of 
the Ural region, in which correlations will be made with the American 
formations and faunas. LPS 
