


1 891.] Recent Literature. 899 
RECENT LITERATURE. 
Geological Survey of Arkansas, 1889.'—This volume of the 
Geological Survey’s reports relates principally to Crowley’s Ridge,— 
the only marked topographic prominence in the country between 
Little Rock and Memphis, the geology of which is most admirably 
discussed by R. Ellsworth Call, who contributes, also, notes on the 
forest trees of this region, and a description of a new mollusk, Mytilus 
harnatoides, trom the Tertiary of Eastern Arkansas. Prof. R 
Salisbury has a chapter upon the relations of the northern drift to the 
Plistocene deposits, where he clearly sets forth the succession of events 
in the northern part of the United States during Plistocene times, 
and points out the relations of those events to the influences that 
shaped Crowley’s Ridge and its adjacent territory. A valuable paper 
from Prof. F. H. Knowlton, on the ‘ Fossil Woods and Lignites of 
Arkansas,’’ and a brief explanation from J. C. Branner as to the 
origin of Crowley’s Ridge, make the report on this region of 
Arkansas complete. 
Zoological Geography.?—The study of the zoological distribu- 
tion of animals is one which is making continual advances. It is wit 
the view of presenting the principles of this science in a comprehen- 
sive yet brief and simple manner that M. ener has written this 
book. It is one of the Bibliothèque Scientifique Contemporait: , and, 
like the others of that admirable set, is well sion with pictures, 
diagrams, and tabulated statements to express at a glance the author’s 
meaning. 
In general, the greater divisions established by Sclater and Wallace 
have been followed, but some changes have been necessitated by the 
progress made during the last five years. 
In chapters I. to V. the author describes the great continental 
regions which have been distinguished according to the distribution of 
the higher vertebrates. Chapter VI. is a study of the means of the 
dispersion of animals, both by their own locomotive powers and by 
agencies outside of themselves. Here, also, will be found a sketch of 
the faunal characters of the different regions,—a branch of the subject 

1 Annual Report of the Geological Survey of Arkansas, 1889. Vol. II., “ The Geology 
of Crowley's Ridge,” by R, Ellsworth Call, M.S 
- 2 La Géographie Zoologique. Par Le Dr. E, L. Trouessart. Librairie J. B. Bailliere et 
Fils, Paris. : 



