PRINCIPLES OF ZOOLOGY, 



Touching the Structure. Development, Distribution and Natur&J 

 Arrangement of theKaccs of Animals, living and extinct; with numer- 

 ous Illustrations. For the use of 'Schools aiid Colleges. Part 1. Com- 

 parative Physiology. 



B^ Louis AI.;A.-SJ>: AND AUGUSTUS A. GOULD. 



EXTRACTS FROM THE PREFACE. 



" The design of this work is to furnish an epi'.ome of the leading princi- 

 ples of the science of Zoology," as deduced from the present state of. 

 knov ledge, so illustrated as to be intelligible to the beginning student. No 

 similar treari>'.' now exists in this country, ;md, indeed, some of the topics 

 have not been touched upon in the language, unless in a strictly technical 

 form, and in scat'ered articles." 



" Being designed for American students, the illustrations have been drawn, 

 as far as possible, from American objects. . . . Popular names have 

 been employed as far as possible, and to the scientific names, an English 

 termination has generally been given. The first part is devoted to Com- 

 parative Physiology, as the basis of Classification; the second, to System- 

 atic Zoology, in \viiicb the principles of Classification will be applied, and 

 the principal groups of animals briefly characterized." 



NOTICES OF THE PRESS. 



" This work has been expected with great interest. It is not pimply a 

 system by which we are taught the classification of Animals, but it is 

 really what it professes to be, the ' Principles of Zoology,' carrying us on 

 step by step, from the simplest truths to the comprehension of that infinite 

 plan which the Author uf Nature has established. . . . This book places 

 us hi possession of information half a century in advance of all our element- 

 ary works on this subject. . . . Xo work of the same dimensions has 

 ever appeared in the English language, containing so much new and valu 

 able information on the subject of which it treats." Prof. James Hall, in 

 the Albany Journal. 



"A work emanating from so high a source as the '^Principles of Zoology,' 

 hardly requires commendation to give it curi-eney. The public have become 

 acquainted with the eminent abilities of Prof. Agassiz through his lectures, 

 and are aware of his vast learning, wide reach of mind, and popular mode 

 of illustrating scientific subjects. In the preparation of this work, he has 

 had an able coadjutor in Dr. A. A. Gould, a frequent contributor to the 

 Transactions of 'the Boston Society of Natural History, and at present 

 engaged upon the department of Conchology, for the publication of the late 

 exploring expedition. The volume is prepared for the student in zoological 

 science; it is" simple nd elementary in its style, full in its illustrations, 

 comprehensive in it? range, yet well condensed, and brought into the narrow 

 compass requisite for the purpose intended." SHUnum's Journal, June, 1S48 



"The work is admirably adapted, to the use of schools and colleges^ an i 

 ought to be made a study in all our higher seminaries, both male and 

 female." New York Obstrrtr. 



" To the testimony which is furnished by their distinguished scholarship, 

 we may add, however, that the classifications of the work are so admiral;! y 

 arranged, and its descriptions given with so much simplicity and clearness 

 of language, that the book cannot fail of its practical aim to facilitate 

 the r -ogress of the beginning student- It is a work for schools." 



New York Recorder, 



