268 SCIENTIFIC THOUGHT. 



suggested the theory of descent : it was used by those 

 who most strongly repudiated such a doctrine.^ 



In the absence of any satisfactory explanation of the 

 continual recurrence of certain definite forms in nature, 

 and the presence of an evident relationship and a clear 

 indication of metamorphosis in single instances, it was 

 natural that morphologists of the first order, such as 

 Owen, and other authorities in science, such as Whewell 

 in England and Alexander Braun in Germany, should 

 have recourse to older views and vague philosophical 

 theories. Owen in 1848 spoke of a specific organising 

 principle which " moulds in subserviency to the exigencies 

 of the resulting specific forms," argues tliat the know- 

 ledge of such a being as man must " have existed before 

 man appeared, for the divine mind which planned the 

 archetype also foreknew all its modifications," and con- 

 cludes that we learn from the past history of our globe 

 that " nature has advanced with slow and stately steps, 

 guided by the archetypal light, amidst the wreck of 

 worlds, from the first embodiment of the vertebrate 

 idea under its old ichthyic vestment until it became 

 arrayed in the glorious garb of the human form.""^ 



1 Huxley in ' Life of 11. Owen,' pertie.s of matter, there appears 



vol. ii. p. 302. also to be in counter - operation 



- See Owen's treatise ' On the ■ during the building up of such 

 Nature of Limbs,' 1849, pp 85, bodies the polarising force pervad- 

 86. In the essay ' On the Arche- ing all space, and to the operation 

 type and Homologies of the Yerte- of which force, or mode of force, 

 brate Skeleton,' he concludes with the similarity of forms, the rep- 

 tile following remarks : " Now, be- etition of parts, the signs of the 

 sides the iSe'a, organising ]irinciple, unity of organisation may be 

 vital property, or force, which ]iro- mainly ascribed. The Platonic 

 duces the diversity of form belong- iSia or specific organising principle 

 ing to living bodies of the same or force would seem to be in an- 

 materials, which diversity cannot tagonism with the general polar- 

 be explained by any known pro- ising force, and to sul)due and 



