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Chordata
The Chordata comprises a great group
of animals posessing a spinal chord among
the lowest of animals is a small group
know as Ascidians [os sea] - squirts. The
Ascidians are among the very lowest of the
group and poses a chord known as the
[notochord]. The young when hatched
resemble tadpoles; after swimming
about for a few [abows] they settle down and
are attached to some objects; the rest of the
live from this point on , degeneration [ennes],
The Tail disappeared and with it the [noto] -
chord and the greater part of the narrow
system. Other changes take place [mTail]
finally their is little left in the animal to
remind one of a vertibrate.

Fishes
The lowest of the tree [reertbrateo] are the
[feiheo], they are possessed of an air bladder,
which is many [eares] at least series as a
float to keep the fish suspended at a [defan]
level. By contracyion of muscles surrounding
the air bladder the air is [olien] out
and the fish gradually winks. [Geep] sea
fishes when brought to the surface where the
[prem]