Review of Recent Geological Literature. 189 
Cretaceous, and at least seven others were certainly so, mak- 
ing a minimum of eighty-six Cretaceous species exhibited. 
The collection included Orbitolina texana Roem., wliich in 
Texas belongs in beds — the Alternating beds or Glen Rose 
division — that geologists of the United States have generally 
included in the lower Cretaceous, but which was here as- 
signed to the upper Jurassic. 
From Everywhere, as exhibited by Prof. H. A. Ward, 
Rochester, N. Y. 
Vertebrate paleontology, which seems conspicuous for its 
lack of representation in most of the geological exhibits at 
the World's Fair, was represented by many leading fossils and 
casts in the comprehensive Mesozoic and Tertiary (as well as 
Paleozoic and Quaternary) collections which formed a part of 
the superb exhibit from Ward's Natural Science Fstablish- 
ment, in the Anthropological building, an exhibit of which it 
would be difficult to speak too highly; for whether it were 
vertebrates, invertebrates, plants, or rock-types, and these 
Paleozoic, Mesozoic, or Cenozoic, American or foreign, that 
one wished to see, they were there displayed in fine form for 
inspection. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
Economic Geology of the United States. By Ralph S. Tabr, Assis- 
tant Professor of Geology at Cornell University. 8vo., pp. xx, 509, il- 
lustrated. Maemillan and Co., New York, 1894. Price, $4.00. 
Much has been done in the past quarter of a century toward popular- 
izing the study of general geology. The descriptions of rocks and fos- 
sils and the physical arid chemical changes which the earth has under- 
gone and is still passing through, have been couched in untechnical 
language and a general knowledge of them is now possessed by many 
who are not specially educated as geologists. For the science of eco- 
nomic geology, however, this important work has not been so well per- 
formed. It is only a specialist who can pretend to a knowledge of the 
natural inorganic products of our country, and even his information 
must often be derived from personal examination, or by laborious re- 
search into the geological reports and the wide-scattered technical lit- 
