230 SPECIES NOT 



imagination can picture to itself, of a grade of 

 permanent forms of once living beings. The facts 

 have become well known, from experiments upon 

 inferior animals, as the dog, rabbit, etc. Pro- 

 fessor Bennett has given, in his "Outlines of 

 Physiology," p. 166, et seq, a series of twenty- 

 eight figures, taken from the plates of the cele- 

 brated embryologist Bischoff. I mention these 

 instead of the originals, because they are more 

 accessible, and the nature of the subject requires 

 references rather than details. 



Professor Bennett has also a series of wax- 

 models of each of these phases, in the development 

 of the embryo of the dog. Now what do we 

 see? Why continuous development. The embryo 

 is from beginning to end imperfect, and there is 

 not one figure, except that of the ovum, which 

 can, by the most prejudiced believer in natural 

 selection, be turned into the likeness of any living 

 thing. The organisms are all incomplete, they 

 do not fulfil the essential elements, which can 

 be summed up into a living animal; and the 

 last, that which is seen when the shape and form 

 is becoming discernible, has all the viscera ex- 

 posed, and is as unlike anything we can conceive 

 to represent a living permanent creature, as can 

 possibly be imagined. But what we do see, is 

 the most beautiful series of changes in the form- 

 ation of the being. A great deal of light is 

 thrown upon the mode of development in living 

 things, by these observations of Bischoff, but they 

 utterly annihilate the doctrine of permanency of 



