Ill CRITICISMS ON " THE ORIGIN OF SPECIES " 81 



Reader, for February 27th of this year) supporting 

 similar views with all the weight of his special 

 knowledge and established authority as a linguist. 

 Professor Haeckel, to whom Schleicher addresses 

 himself, previously took occasion, in his splendid 

 monograph on the Radiblaria, 1 to express his high 

 appreciation of, and general concordance with, Mr. 

 Darwin's views. 



But the most elaborate criticisms of the " Origin 

 of Species" which have appeared are two works of 

 very widely different merit, the one by Professor 

 Kolliker, the well-known anatomist and histolo- 

 gist of Wiirzburg; the other by M. Flourens, 

 Perpetual Secretary of the French Academy of 

 Sciences. 



Professor Kolliker's critical essay "Upon the 

 Darwinian Theory" is, like all that proceeds from 

 the pen of that thoughtful and accomplished 

 writer, worthy of the most careful consideration. 

 It comprises a brief but clear sketch of Darwin's 

 views, followed by an enumeration of the leading 

 difficulties in the way of their acceptance ; diffi- 

 culties which would appear to be insurmountable 

 to Professor Kolliker, inasmuch as he proposes to 

 replace Mr. Darwin's Theory by one which he 

 terms the " Theory of Heterogeneous Generation." 

 We shall proceed to consider first the destructive, 

 and secondly, the constructive portion of the 

 essay. 



1 Die Radiolarien : eine Momgraphie, p. 231. 



VOL. n a 



