472 REVIEWS 



with the Paludinenbank of Germany, the Norfolkian of England, and the 

 Giinz-Mindel interglacial beds of the Alpine region. 



As the second glacial series, the Kansan of the Keewatin field, and, 

 questionably, the old deposits of the Allegheny Valley as a doubtful repre- 

 sentative of the Labradorean field, are brought into comparison with the 

 Lower Diluvium of the German lowlands, the Old Drift of England, the 

 Mindel of the Alps, and the younger Deckenschotter as the associated 

 outwash deposit of the last. The American correlatives of the last, in 

 kind, are passed over. 



The representatives of the second interglacial stage are the Yarmouth 

 and the pre-Illinoian loess, on the American side, the Rixdorf of north 

 Germany, unnamed beds in central Russia, and the Mindel-Riss inter- . 

 glacial deposits of the Alps, on the European side. 



As representatives of the third glacial stage, the lUinoian of the Labrador 

 field and doubtfully the "so-called lowan of the Keewatin field (lUinoian ?) " 

 are put into correlation with the Middle Drift of the north German lowland 

 and the Riss drift of the Alps. 



The third interglacial stage brings into comparison the Sangamon 

 soil of the Labradorean field (no equivalent in kind in the Keewatin field) 

 with the Riss-Wiirm interglacial deposits of the Alps. The main loess 

 deposits of both the American and the European fields are discussed in this 

 connection and made largely interglacial and eolian. 



Only four glacial stages are recognized and the comparison ends with 

 the fourth group, which embraces the Wisconsin series of America, the 

 Upper Diluvium of north Germany, the Young Drift of England, and 

 the Wiirm beds, with the associated Niederterrassen of the Alpine region. 

 The glaciation of the Riesengebirge and the Schwarzwald are also touched 

 on in this connection. 



In the summary, some qualifications of the correlations are introduced, 

 the most notable of which is the statement that "the European deposits 

 seem to contain nothing that correlates clearly with the lUinoian drift." 

 The middle drift of north Germany and the Riss, "though standing as 

 representatives of the third glacial stage in their respective regions, each 

 seems to be younger than the lUinoian drift." 



• It is in the grouping of this third stage and in the treatment of the lowan 

 that there is likely to be awakened the strongest dissent from the comparison 

 of Mr. Leverett if it be considered — as it is liable to be considered — a 

 representative rathei* than an individual correlation. It is important, the 

 rather, to note that in the author's own point of view, the third stage, the 

 Middle Drift, presents the most notable anomalies. There is little doubt 



