on_ on the origin of
the organic existences that have been successively exhibited.

It will be convenient, however, first to introduce a synoptic view of
the evolutions of the earth as set forth in this and the preceding
section. For this purpose the author has introduced a parallel table,
exhibiting on one side a scale of animal life beginning with the
humblest and ascending to the highest species; and on the other side the
successive series of rock formations, in which their fossiliferous
remains have been found up to the present superficial deposits of the
globe. Objections have been made to the correctness of the author's
analogies, scale, and his classification of animals, the chief of which
will be adverted to in the next section; but the table is essential, as
presenting at one view an outline of the hypothesis he has sought to
establish.

SCALE OF ANIMAL KINGDOM. ORDER OF ANIMALS IN ASCENDING SERIES FOETAL HUMAN BRAIN
OF ROCKS. RESEMBLES, IN
_Invertebrata._
1 Infusoria _Traces of Infusoria_(?) 1 Gneiss and Mica\
Slate System \
2 Polypi Polypiaria \ \
5 Echinodermata Echinodermata \ \
{ 7 Brachiopoda {15-20 Brachiopoda} Crustacea } 2 Clay Slate System \ 1st month, typically,
Moll-{ 9 Pteropoda Artic-{Crustacea Pteropoda } / } that of an
usca {10 Gasteropoda ulata {12-14 Gasteropoda} Annelides / / avertebrated animal
{11 Cephalopoda {Annelides Cephalopoda} \ /
} 3 Silurian system /
_Vertebrata._ { _Remains of Fishes_ / /
{ Fishes of low type; \ \
32-36 Fishes { heterocercal; allied } 4 Old Red Sandstone } 2nd month, that of a fish;
{ to crustacea / /
{ Sauroid Fishes \
37 Batrachia (frogs, &c.) Batrachia \