462 Recent Literature. [July, 
graphy of the interior of the North American continent ; and the 
adoption of some of the pseudonyms of American vertebrate 
fossils, which have latterly become current in some quarters. 
Such are Dinoceras and Brontotherium, which it is well known in 
this country have never been distinguished as genera from the 
old Uintatherium and Menodus. 
MATERIAL FOR A BIBLIOGRAPHY OF NORTH AMERICAN MAM- 
MALS. — This work covers 132 pages of closely printed quarto of 
the series of final reports of the Hayden Survey. It includes 
references, by page and date, to all works and papers, large and 
small, which relate to the Mammalia of North America, both 
recent and extinct. Such a work as this, if well prepared, must 
be, it is easily perceived, most invaluable to the student in this 
extensive department, as well as to all persons desiring access to 
any part of it. After a critical examination of its contents we can 
say that it fully justifies the reputation of its authors for fullness 
of research and accuracy of statement. Its arrangement is well 
calculated to meet the needs of the student. The first division 
includes general works; the second, those on faunz and distri- 
bution. Then follow the orders of the class, each constituting a 
division; and papers received or discovered during the compila- ` 
tion of the preceding part of the work, complete it. In the case 
of extinct vertebrata, lists of species described in the respective 
papers are given, which is an obvious convenience; while the 
arrangement is chronological. The date of publication is usually 
given to the day, but a few omissions in this regard are noticeable. 
e recommend this work as an index to the subject of Mammal- 
ogy, which no student can be without. 
Kino’s GEOLOGICAL EXPLORATIONS OF THE FORTIETH PAR- 
ALLEL.—The second and fourth volumes, and atlas of geological 
aps of this important Survey, have lately appeared from the 
office of the United States Engineers, War Department. 1877. 
Volume ii. is entitled Descriptive Geology, by Arnold Hague and 
5 F mons. It is illustrated by twenty-six photographs of 
the more remarkable scenery along the Union and Central Pacific 
Railroads, from Wyoming and Colorado to the Sierra Nevada, 
and is of particular value as giving a detailed description of the 
geology of a region often visited by travelers and scientists, while 
the work will eventually prove of great economic importance. 
The fourth volume contains, Part i., Palæontology, by F. B. 
Meek; Part ii., Palæontology, by James Hall and R. P. Whitfield ; 
Part iii., Ornithology, by Robert Ridgway. We have noticed the 
latter work elsewhere. The posthumous work of Mr. Meek is 
illustrated by seventeen plates, representing fossils from the 
1 Appendix B of the Monographs of the North American Rodentia, by Dr. COUES 
and Mr. ALLEN, or vol. ix. final Report U. S. Geol. Survey Terrs. under Dr. F. V. 
Haypen. By Prof. THEODORE GILL and Dr. ELLIOTT COUES. 
