; 
—108 THE GENEALOGY OF ANIMALS Iv. 
the systematising power, of Oken, without his ex- 
travagance. The “Generelle Morphologie” is, in 
fact, an attempt to put the Doctrine of Evolution, 
so far as it applies to the living world, into a logical 
form ; and to work out its practical applications to. 
their final results. The work before us, again, may 
be said to be an exposition of the “Generelle 
Morphologie ” for an educated public, consisting, 
as it does, of the substance of a series of lectures 
delivered before a mixed audience at Jena, in the 
session 1867-8. 
“The Natural History of Creation,’—or, as- 
Professor Haeckel admits it would have been 
better to call his work, “The History of the 
Development or Evolution of Nature,’—deals, in 
the first six lectures, with the general and his- 
torical aspects of the question and contains a very 
interesting and lucid account of the views of Lin- 
nus, Cuvier, Agassiz, Goethe, Oken, Kant, 
Lamarck, Lyell, and Darwin, and of the historical 
filiation of these philosophers. 
The next six lectures are occupied by a well- 
digested statement of Mr. Darwin’s views. The 
thirteenth lecture discusses two topics which are 
‘not touched by Mr. Darwin, namely, the origin of 
the present form of the solar system, and that of 
livmg matter. Full justice is done to Kant, as the 
originator of that “cosmic gas theory,” as the 
Germans somewhat quaintly call it, which is 
commonly ascribed to Laplace. With respect to 
