Review of Recent Geological Literature. 2X;$ 
used. The products of petrpgraphic work consisted of rock 
sections with microphotographs of rock sections in both black 
and colored prints. 
Two of the courses in paleontology were represented. The 
first is a combination lecture and laboratory course in which 
the subject is treated from its biological side; the specimens 
presented illustrated the biological method of teaching, re- 
cent forms being used together with fossils to demonstrate 
development. Cut and polished specimens, thin sections and 
plaster casts indicated the variety of materials used in the 
laboratory. The second course is chiefly a laboratory course, 
consisting of the study of the characteristic fossil forms and 
lithologic appearance of the numerous geological horizons. 
Materials from a few horizons were exhibited. Photographs 
of the laboratory taken with students at work and the in- 
structor in attendance were typical of a busy department. 
Some colored sections and diagrams of veins and ore depos- 
its evidenced the quality of illustration used in connection 
with the lecture courses upon economic geology. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
Flora of the Outlying Carboniferous "Basins of Southwestern Missouri. I>\ 
David White. U. S. Geol. Survey, Bulletin No. 93, 1893, 8vo. L39pp.,5pl. 
The material forming the basis of this work was mainly obtained bj 
\Y. P. Jenne-y, of the U. S. Geological Survey, in 1889 while investigat- 
ing the zinc and lead products of Jasper and Lawrence counties in 
southwestern .Missouri. The fossil-bearing shales are said to occur in 
lenticular masses, which lie in eroded depressions in the limestone "of 
Warsaw — St. Louis age," and to be the most recent fossiliferous rock 
within the limits of the lead and zinc region known to have been laid 
down before the ores were deposited. 
The identifiable species, barely thirt\ in all. distributed chiefly among 
the Equisetinece, Welicinece and Lycopodinece, the author has taken up one 
b\ one and treated in a most exhaustive and scholarly manner. The live 
well executed plates enhance the value of the work largely, although 
the descriptions are written with ureal care. After summarizing the 
distribution of the species as they occur at various localities and hori- 
zons throughout the United states, the conclusion is reached thai thej 
belong to a flora somewhat younger than thai of Clinton: and "if such 
be the case, the lead and zinc ores of the region must have been depos- 
