256 Henriksen, Darwinism To-Day. 



nun W. Kapelkin, dass ich bei Abfassung meines Aufsatzes im 

 Jahre 1906 seinen russischen Artikel von 1905 als Vorlage benutzt, 

 ihn aber absichtlich nicht erwähnt habe. Um dieser Verdächtigung 

 entgegenzutreten, möchte ich folgendes mitteilen: 



1. Der Aufsatz Kapelkin's „Die biologische Bedeutung" etc. 

 wurde mir erst in seiner deutschen im Biologischen Centralblatt 

 erschienenen Übersetzung bekannt. 



2. Mein im Jahre 1906 erschienener Aufsatz ist die wört- 

 liche Übersetzung eines von mir im Jahre 1903, 7. November 

 vor der Gesellschaft der Naturwissenschaftler — Professoren und 

 Studenten — an der Universität Sofia gehaltenen Vortrags, von 

 dem ein Auszug in den Protokollen der oben genannten Gesellschaft 

 enthalten ist. 



xMünchen, den 1. Februar 1908. M. Popofl 



Darwinism To-Day. 



By Vernon L. Kellogg, Professor of Entomology Leland Stanford University, 



California, p. 395. 



Prof. Kellogg has in this volume discussed the present stand- 

 ing of Darwinism i. e. the selection theories. He devides it into 

 three parts: Darwinism attacked, Darwinism defended, and Other 

 Theories of Species forming. It is an admirable written book. In 

 a clear and concise form he explains the view of the leading bio- 

 logists on this subject. It will perhaps give the German student 

 a better knowledge on the work done on this subject in The United 

 States. However many American students would have wished the 

 author had paid more attention to work done at home. We have 

 in The United States a number of biologists who has accomplished 

 much in this line but refrain from publishing it, and much has 

 been published but paid little attention to. Another objection 

 which perhaps will be made when the Professor considers such 

 theoretical questions, is too little attention is paid to the results 

 of experimental embryology. We have much research which allows 

 interpretation in finding the causes for structures instead of dealing 

 with them ready made. 



The work of Professor Tower and a number of other biologists 

 has through their work added much to the interpretation of origin 

 of structures through environmental influence. 



As to the authors own view we can judge only from his own 

 and his associates work. He seems sceptical as to the „Almacht" 

 of natural selection and he as many American biologist refuses to 

 give up the Lamarckian theory. 



The book is especially adapted for the coming generation ol[ 

 biologists, those who have not followed the struggle in the years 

 passed, but wishes to get an introduction to this important study] 

 and for them it is very welcome both here and abroad. 



Martin E. Henriksen. 



Verlag von Georg Thieme in Leipzig, Eabensteinplatz 2. — Druck der k. bayerj 

 Hof- und Univ.-BucMr. von Junge & Sohn in Erlangen. 



