120 The American Geologist. February, 1902. 
resources are confined almost wholly to the western part, the chief 
product being coal. 
The Eocene report comprises a stratigraphical account by W. B. 
Clark and G. C. Martin, and a paleontological report by various spe- 
cialists. The point of view is thoroughly modern, the facts being con- 
sidered in their bearing on past physical and bionomic conditions. 
The homogeneous nature of the materials indicates undisturbed con- 
ditions throughout the Eocene. The deposits, which are largely 
glauconitic, were accumulated slowly and far from any coast. They 
contrast strongly with the contemporaneous sediments of the gulf 
region, which are highly diversified and represent accumulations from 
sediment bearing rivers. The strata of the middle Atlantic slope 
therefore are represented in the gulf by deposits many times their 
thickness. It is obvious that faunal differences are to be expected in 
the two regions and that hence the usual method of taking certain 
gulf fossils as typical of the Eocene, does not represent the facts. A 
comparison by means of tables of the mollusca and corals in the two 
regions is made, with the result that although enough common spe- 
cies are known for correlation, yet the range of these common species 
is different in the two localities and many other species are distinct. 
The true basis of stratigraphy is obviously to be found not only in 
a consideration of physical and biological criteria, but also of the ef- 
fects of these conditions on the organisms. The changing and shore 
character of the gulf region produced different faunal changes from 
the quiet deep water Atlantic coast Eocene. 
These two volumes are admirably illustrated and are bound sim- 
ilarly to the previous Maryland reports. They contain colored maps 
and sections, and are in all respects worthy of accompanying their 
predecessors. TH. 
Kinderhook Faunal Studies: III, The Faunas of Beds No. 3 to No. 
7, at Burlington, Iowa; by Stuart “Wetter. (Trans. St. Louis 
Acad. Sci., Vol. XI, pp. 149-214, 1901.) 
The third installment of the Kinderhook Faunal Studies has to do 
with the described fossils from five thin layers, having a total thick- 
ness of about thirty feet, which lie immediately beneath the great 
Burlington limestone, at Burlington, Iowa. The chief importance of 
the memoir lies in the fact that for the first time there are illustrated, 
by good figures, many of the forms described from the locality. The 
drawings of the types described by C. A. White, which are now in 
the University of Michigan, are especially to be noted. To one who 
has never collected fossils at Burlington, the paper will be particularly 
helpful in locating the exact geological horizons of the various forms. 
Altogether there are nine plates of figures. Of most of the species 
illustrated, the original descriptions are given. The critical remarks 
accompanying are especially useful to the systematic paleontologist; 
and supply long wished for information concerning the fossils in ques- 
tion which, for more than a generation have been the despair of collec- 
