IV. THE CELL IN DEVELOPMENT AND 



INHERITANCE. 



BY 



EDMUND B. WILSON, Ph.D., J.H.U., 



Professor of Invertebrate Zuuloyy, Culunibia Culleye. 



This volume contains a presentation in a simple form of tlie 

 present state of our knowledge regarding cell-orgunizatiou and 

 its bearings upon the phenomena of develoj)meiit. 



The point of view and mode of treatment dilTers widely from 

 that taken in Hertwig's recent work on tlie Cell, 'i'lic cl-II i.s 

 treated primarily as the basis or substratum of inheritance. 

 Attention is therefore directed at the outset especially to the 

 germ-cells — to their structure and maturation, their union in 

 fertilization, to the phenomena of cell-division, and to the earlier 

 stages of embryological development as illustrating the ])roblems 

 of cell-dynamics. 



These chapters are used as an introduction to a more general 

 account of the cell, considered both as an indei)endent organi.<m 

 and as a unit of more complex structure and action. The organ- 

 ization of the cell is fully described, the functions of its various 

 parts critically discussed, and a review given of modern theories 

 of protoplasmic structure and action. The latter part of the 

 work is devoted mainly to recent discoveries in experimental 

 embryology in their bearing on the current tlieories of Wei.^- 

 mann, Hertwig, and others, regarding the essential nature of 

 development, differentiation, and regeneration. The V(jlume 

 will be fully illustrated. 



Just Puhlished, 



BIOLOGICAL LECTURES AND ADDRESSES 



DELIVERED BY THE LATE 



ARTHUR MILNES MARSHALL, M.A., M.D., D.Sc, F.R.S., 



Professor vf Zooloqy in Oirens Collfc/e ; Late Fellow of 

 8t. John's Colleije, Cambridge. 



EDITED BY 



C. F. MARSHALL, M.D., B.Sc, F.R.C.S. 



Cloth, 12mo, pp. 363. $2.00. 



THE MACMILLAN COMPANY, 



66 FIFTH AVENUE. NEW YORK. 



