314 AN INTRODUCTION TO ZOOLOGY. 



may be useful to the isolated and self-taught student, 

 however unlikely to enter for any examination. 



A list of standard Zoological text-books is given at 

 the end of this chapter. It is not intended to be 

 exhaustive, but to be initiatory; and various well- 

 known books have therefore been omitted from the 

 list. 



The student who wishes to make a further acquaint- 

 ance with the literature of Zoology, will find useful 

 lists of books in Swan Sonnenschein's Tlie Sest Books 

 and Reader's Guide, section "Zoology," 1891 and 1895. 



Having mastered as much as it is possible of the 

 above-named course of elementary biology, the reader 

 should procure Jeffrey Bell's Gomparative Anatomy 

 and Physiology, and study it carefully; not only be- 

 cause it explains the most advanced problems of 

 Zoology, and the most advanced ideas about them, in 

 a very terse and clear manner, but also because it 

 embodies some of the views of Prof. Ray Lankester, 

 which occupy a most important place in the history 

 of morphological science. After this, the student 

 cannot do better than turn back and read these books 

 over again ; by that time he will begin to know how 

 to use a text-book of Zoology. 



It must of course be understood that no mention has 

 been made of the vast field of literature which marks 

 the actual progress of zoological science, and embodies 

 the results obtained by workers whose very names 

 are unknown, except to those who are fairly acquainted 

 with the science. The references given in some of the 



