skull-less

At the ninth stage, called the skull-less animals (acrania), and corresponding to the still living lancelet, we enter the series of the vertebrates.

The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality Rudolf Schmid

Even in the skull-less vertebrate, the Amphioxus, we find no independent brain, as we have seen.

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

Man's ancestors are skull-less Vertebrates, like the Amphioxus.

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

Amphioxus, and the numerous skull-less vertebrates, related to the

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

We may, however, trace man's genealogical tree not only as far as the lower mammals, but much further -- to the amphibia, to the shark-like primitive fishes, and, in fine, to the skull-less vertebrates that closely resembled the Amphioxus.

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

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

The gastraea theory shows us how to do this, by representing the embryology of the lowest vertebrate, the skull-less amphioxus, as the original form, and deducing from it, through a series of gradual modifications, the gastrulation and coelomation of the craniota.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

I would rather belong to that race that commenced with that skull-less vertebrate; that produced Shakespeare, a race that has before it an infinite future, with the angel of progress leaning from the far horizon, beckoning men forward and upward forever.

Lectures of Col. R. G. Ingersoll, Volume I Including His Answers to the Clergy, His Oration at His Brother's Grave, Etc., Etc. Robert Green Ingersoll 1866

I thought after all I had rather belong to a race of people that came from skull-less vertebrae in the dim Laurentian period, that wiggled without knowing they were wiggling, that began to develop and came up by a gradual development until they struck this gentleman in the dug-out; coming up slowly -- up-up-up -- until, for instance, they produced such a man as

Lectures of Col. R. G. Ingersoll - Latest Robert Green Ingersoll 1866

I would rather belong to one that commenced at the skull-less vertebrae and started for perfection, than to belong to one, that started from perfection and started for the skull-less vertebrae.

Lectures of Col. R. G. Ingersoll - Latest Robert Green Ingersoll 1866