ITS CHARACTERISTIC ANIMALS. 
207 
lections have been made from all these deposits ; 
and there has never been brought to light a sin- 
gle fact leading us to suppose that any interme- 
diate forms have ever existed through which 
more recent types have been developed out of 
alder ones. For thirty years Geology has been 
gradually establishing, by evidence the fulness 
and accuracy of which are truly amazing, the 
regularity in the sequence of the geological for- 
mations, and distinguishing, with ever-increasing 
precision, the specific differences of the animals 
and plants contained in these accumulations of 
past ages. These results bear living testimony 
to the wonderful progress of the kindred sciences 
of Geology and Palaeontology in the last half-cen- 
tury ; and the development-theory has but an 
insecure foundation so long as it attempts to 
strengthen itself by belittling the geological rec- 
ord, the assumed imperfection of which, in de- 
fault of positive facts, has now become the favor- 
ite argument of its upholders. 
