Capitolo 31
Illustration of The Labyrinthodon.--------
Birds made their first aspect during the time of Mesozoic, and
here we get a clear perspective of the methods of nature of job.
There is anymore a doubt but that the first birds were simply
changed reptiles. The first bird had an articulated and long tail and a
you accredit well provisioned with formidable teeth.<18 > It was during this
period that the first representative of the class Mammalia, to
what man belongs, you/he/she appears.<19 > It is in the stones of this it was
what we meet there with rests of marsupials, the order to that
opossumses belong. This is the lowest of the Mammalian class.
To the class Mammalia belongs the animals extremely organized.
They has been the dominant animals since the closing of Mesozoic
time. We now have to look at their development with special care.
For this brief revision, as far as you/he/she has gone, you/he/she has shown a you consolidate
and gradual progress in the life forms, invariably lowers him
preceding the tallest. We feel therefore that it will be vain to
you look for for some trace of man until us we find sure tests of the
existence of all the forms of animals under him. The last great
division of time has called Cenozoic.<20 > This intends the new life
forms. In this age, the forms of the life very I am more our neighbors really.
As it was of the duration during this epoch when man ago his
aspect, holds better him to us to go in more detail, and it gives the
subdivisions of this period. You/he/she has broadly been enough to
simply gives the contours of the other periods. To mend
more clearly the sequence of the life, we will give a contour
showing the periods we have made a review, and also the subdivisions
of the time of Cenozoic that we now have to examine with
more care.
CONTOUR.
LIFE.
Time of Archaean.
The beginning: it Includes the elapsed of the long time when the globe
you/he/she could not sustain the life, but toward his/her weak and near traces of
the life, animal and vegetable, appeared.
Paleozoic Time.
The Period of Old Forms of Life: Forests of trees of flowerless;