News | Published:

Prof. Huxley's Lectures on the Evidence as to the Origin of Existing Vertebrate Animals1

Nature volume 13, pages 514516 | Download Citation

Subjects

Abstract

V.

WE saw in the last lecture that the differences between birds and reptiles were very great; nevertheless, many of them tend to disappear on a closer examination. For instance, the extremely avian character of the absence of teeth, and the presence of a horny beak, is found in turtles and tortoises; that of the penetration of the bones by air cavities exists in the skull of crocodiles; and, although no existing reptile possesses the power of flight, or a fore-limb in any way approaching in structure to a bird's wing, yet, in the crocodiles, the fourth and fifth digits—those we found to be wholly absent in the bird—rare much smaller than the others, and have no claws.

About this article

Publication history

Published

DOI

https://doi.org/10.1038/013514a0

Authors

    Comments

    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

    Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing