REVIEWS Aa 
upon the geology of the Amazon valley. Among these contributions 
are Hartt’s and Rathbun’s papers on the Devonian fossils of Para, 
Derby’s papers on the Carboniferous and on the Physical Geography 
of the Lower Amazon, and Clarke’s report on the Ereré tribolites, 
besides a number of papers of minor importance, but all of them of 
value. 
Director Goeldi deserves great credit for bringing out at last the 
work of the men who have done so much and such important pioneer 
work for geology in Brazil. 
The Devonian fauna of the Red Maecurt. By Dr. F. Karzer. 
The same number of the 4o/etim contains an interesting paper by 
Dr. Friederich Katzer on “The Devonian fauna of the Rio Maecurt, 
and its relations to the faunas of the other Devonian terranes of the 
globe.” His studies are based upon the materials gathered by Hartt 
and Derby and some later collections made in 1896. The conclusion 
is reached that the Rio Maecurti fauna resembles more closely that of 
the middle Devonian of North America than it does the lower Devon- 
ian with which it has hitherto been correlated. One of the beds he 
correlates more exactly with the Hamilton of the New York section. 
In comparing the fauna with the Devonian of Europe he says it should 
be compared to the upper part of the lower Devonian. ‘‘ But as there 
can be no doubt that the Rio Maecurt' fauna corresponds to that of 
the Hamilton of North America, which is now considered to belong to 
the middle Devonian we are obliged to assume a@ non-stmultaneous 
development of certain forms in the American and European provinces of 
the Devonian sea, or a migration of these forms from the latter to the 
former provinces. Thus the spirifers with long wings show their prin- 
cipal development in the Rhenish Lower Devonian, but in North 
America and on the Rio Maecurti only in the middle Devonian. /yvo- 
pidoleptus carinatus Conrad is found on the Rhine in the lower Coblenz 
beds, while in America, including the Rio Maecurt territory, it occurs 
only in the middle Devonian. ‘The same is true of corals of the genus 
Pleurodictyum which, in Europe, are found predominating in the lower 
Devonian and in America in the middle Devonian. 
“All this shows that these groups of animals, probably on account 
of progressive alterations, especially of depth, in the sea of the first 
