50 
PROOFS OF EVOLUTION. 
fossils have been found by Professor Marsh, more 
bird-like in character, but still possessing teeth. 
The flying dragons afford another link between 
birds and reptiles. The front half was decidedly 
bird-like, but the hind legs and pelvis were strong¬ 
ly reptilian. 
The anaplotherium connects the swine with the 
cud-chewers; the zeuglodon connects whales with 
seals; and the palaeotherium connects hogs with 
the rhinoceros. These are all true links. 
A remarkable example of a perfect succession 
of links is found in the fossil shells of the Tertiary 
rocks of Wurtemburg, which are literally packed 
with fossil forms. These shells show a complete 
grading to correspond with the order of the rock- 
deposits. Here is evolutionary perfection without 
a break. The life once within these shells, in its 
tribal history presents no “ missing links.” 
To sum up, we find the sponge family—the 
animal-vegetable—near the original protoplasm. 
The lancelet—the first of the back-bone tribe, 
with only a line of cartilage in place of spinal 
vertebrae — connects fishes and mollusks; the am¬ 
phibians connect fishes and mammals; the Archae¬ 
opteryx connects birds and reptiles; the kangaroo 
