“4 
Fal 
a 
ORIGIN OF SPECIES. 9 
the Apteryx, having imperfectly developed wings, a 
diaphragm, and feathers somewhat resembling hair, 
stand between birds and mammalia; and in the 
same connection may be mentioned the Ornithoryn- 
chus, the lowest of the mammalia, and having web- 
bed feet. The Marsupia, connect the Oviparows, 
with the higher mammifers. The Moscesaurus is 
intermediate between the Monitor and Iquana.— 
The generic distinction between the Mastodon and 
the Hlephant, has been almost entirely broken down 
by the discovery of between twenty and thirty inter- 
mediate species, some ranging as far back as the 
Miocene period. (Lyell Ant. Man, 436). The An- 
thropoid Ape evidently stands between animals and 
the human race. 3 
It is not pretended that anything more than a 
general outline of these connections is here traced. 
The gradual development of the brain, also, fur- 
nishes strong evidence of this linking together of the 
animal kingdom. ‘The lowest vertebrate—Amphi- 
has a short spinal cord, but no 

oxus Lanceolatus 
brain, ‘The next advance in fishes, furnishes a brain. 
We have already seen, trom Hugh Miller, the cere- 
bral development in proportion to the length of the 
“spinal cord. Prof. Huxley, in his ‘“‘Man’s Place in 
Nature,’ has thrown a flood of light on the mamma- 
lian brain, in its upward progress. Man, he says: 
“has been affirmed to differ fundamentally, trom all 
the apes, in the character of his brain, which alone, 
