294 Appendix. 



NOTE B. PAGE 27. 



In the Third Edition of his " First Principles" (Stereo- 

 typed), Mr. Spencer, concluding his observations on this 

 topic, says, " From the remotest past which Science 

 can fathom, up to the novelties of yesterday, an essential 

 trait of Evolution has been the transformation of the 

 homogeneous into the heterogeneous." And his last 

 word on the subject is this : 



" As we now understand it, Evolution is definable as 

 a change from an incoherent homogeneity to a coherent 

 heterogeneity, accompanying' the dissipation of motion 

 and integration of matter." Pp. 359, 360. 



NOTE C. PAGES 175 and 214. 



Lawrence, who quotes in confirmation the words of 

 Cuvier, thus concludes his disquisition on the subject : 

 " We may conclude, then, from a general review of the 

 preceding facts, that nature has provided, by the INSUR- 

 MOUNTABLE BARRIER of instinctive aversion, of sterility 

 in the hybrid offspring, and in the allotment of species 

 to different parts of the earth, against any corruption 

 or change of species in wild animals. We must therefore 

 admit, for all the species which we know at present, as 

 sufficiently distinct and constant, a distinct origin and 

 common date." Lectures on Physiology. First Edition. 

 P. 261. 



Cuvier had previously said, " La nature a soin d'em- 

 pecher 1'alteration des especes, qui pourroit rdsulter de 

 leur melange, par 1'a version mutuelle qu'elle leur a donnde : 

 il faut toutes les ruses, toute la contrainte de 1'homme 

 pour faire contracter ces unions, meme aux especes qui se 

 ressemblent le plus . . . aussi ne voyons nous pas 

 dans nos bois d'individus intermediaires entre le lievre 



