Craniota

The second half, which is based on fossil records, also comprises three groups: (iv) Palaeozoic cold-blooded Craniota

Evolution in Modern Thought Gustav Schwalbe 1880

In this formation of the head, skull, and brain, with further development of the higher sense-organs, we have the advance that the Craniota made beyond their skull-less ancestors.

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

We may divide the Craniota generally into Cyclostoma ( "round-mouthed") and Gnathostoma ( "jaw-mouthed").

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

All the Craniota descend from a common stem-form, and this was substantially identical in structure with the Amphioxus.

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

All the other vertebrates belong to the second division, the Craniota ( "skull-animals").

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

Cyclostoma, we may formulate the following thesis: Two divergent lines proceeded from the earliest Craniota, or the primitive Craniota

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

Vertebrate (Prospondylus, Figures 1.98 to 1.102), had the characteristics of the vertebrate as such, but not the important features that distinguish the Craniota from the Acrania.

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

The Craniota descend directly from the Acrania, and these from the primitive Chordonia.

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

The vast division of the Craniota embraces all the Vertebrates known to us, with the exception of the Amphioxus.

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876