VALUABLE SCIENTIFIC WORKS, 



PUBLISHED BY GOTJLD AND LINCOLN. 



LAKE SUPERIOR, 



ITS PHYSICAL CHARACTER, VEGETATION, AND ANIMALS, COMPARED 

 WITH OTHER AND SIMILAR REGIONS ; 



BY L. AGASSIZ. 



WITH A NARRATIVE OF THE EXPEDITION AND ILLUSTRATIONS, 



BY 3. E. CABOT. 



"The character of these scientific labors of Prof. Agassiz is eminently, philosophic 

 and suggestive ; and the grand idea of the work is the demand for the recognition in 

 nature of the agency of a personal God, as a scientific fact, above and beyond all the 

 conditions of physical cause." Literary World. 



" A work rich and varied in matter pregnant of lofty suggestions and comprehensive 

 truths. We commend it to all intelligent readers, whether scientific or otherwise, 

 and whether lay or clerical." Christian Register. 



" The results of this remarkable expedition have been carefully written out by dif- 

 ferent members of the party. It is a work full of interest and instruction to all who 

 have given even the slightest attention to the Natural History of the United States, 

 and will undoubtedly be regarded as one of the most important contributions which 

 this country has ever made to that most fascinating science." Providence Journal. 



PRINCIPLES OF ZOOLOGY. 



NEW REVISED EDITION. 



TOUCHING THE STRUCTURE, DEVELOPMENT, DISTRIBUTION, AND NATURAL 

 ARRANGEMENT OF THE RACES OF ANIMALS, LIVING AND EX- 

 TINCT ; WITH NUMEROUS ILLUSTRATIONS. FOR THE 

 USE OF SCHOOLS AND COLLEGES. 



PART I. COMPARATIVE PHYSIOLOGY. 



BY L. AGASSIZ AND A. A. GOULD. 



" This book places us in possession of information half a century in advance of all 

 our elementary works on this subject. . . No work of the same dimensions has 

 ever appeared in the English language containing so much new and valuable infor- 

 mation on the subject of which it treats." Prof. James Hall, in the Albany Journal 



" A work emanating from so high a source hardly requires commendation to give it 

 currency. The volume is prepared for the student in zoological science ; it is simple 

 and elementary in its style, full in its illustrations, comprehensive in its range, yet 

 well condensed, and brought into the narrow compass requisite for the purpose intend- 

 ed." Silliman's Journal. 



In preparation, 

 PART II. SYSTEMATIC ZOOLOGY. 



Of WHICH THE PRINCIPLES OF CLASSIFICATION ARE APPLIED, AND THE 



PRINCIPAL GROUPS OF ANIMALS ARE BRIEFLY CHARACTERIZED. 



WITH NUMEROUS ILLVSTRATIONS. 



