The Cefl 

 in Development and Inheritance 



By 



EDMUND B. WILSON, Ph.D. 



Professor of Zoology, Columbia University 



Second Edition, Revised and Enlarged 



Illustrated, 8vo, $3.S0 net 



Since the appearance of the first edition of this work, in 1896, the aspect 

 of some of the most important questions with which it deals has materially 

 changed, most notably in case of those that are focussed in the centrosome 

 and involve the phenomena of cell-division and fertilization. This has 

 necessitated a complete revision of the book, many sections having been 

 entirely rewritten, while minor changes have been made on almost every 

 page. 



It has therefore been considerably enlarged, and upwards of fifty new 

 illustrations have been added. The endeavor has, however, still been 

 made to keep the book within moderate limits, even at some cost of com- 

 prehensiveness ; and the present edition aims no more than did the first 

 to cover the whole vast field of cellular biology. Its limitations are, as 

 before, especially apparent in the field of botanical cytology. Here prog- 

 ress has been so rapid that, apart from the difficulty experienced by a 

 zoologist in the attempt to maintain a due sense of proportion in review- 

 ing the subject, an adequate treatment would have required a separate 

 volume. The author has therefore, for the most part, considered the 

 cytology of plants in an incidental way, endeavoring only to bring the 

 more important phenomena into relation with those more fully considered 

 in the case of animals. 



The steady and rapid expansion of the literature of the general subject 

 renders increasingly difficult the historical form of treatment and the cita- 

 tion of specific authority in matters of detail. This plan has nevertheless 

 still been followed. 



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