Book contents
- Frontmatter
- TO THE READER
- Contents
- LIST OF WOOD-CUTS
- STROMNESS AND ITS ASTEROLEPIS.—THE LAKE OF STENNIS
- THE DEVELOPMENT HYPOTHESIS, AND ITS CONSEQUENCES
- THE RECENT HISTORY OF THE ASTEROLEPIS.—ITS FAMILY
- CEREBRAL DEVELOPMENT OF THE EARLIER VERTEBRATA.—ITS APPARENT PRINCIPLE
- THE ASTEROLEPIS.—ITS STRUCTURE, BULK, AND ASPECT
- FISHES OF THE SILURIAN ROCKS, UPPER AND LOWER.—THEIR RECENT HISTORY, ORDER, AND SIZE
- HIGH STANDING OF THE PLACOIDS.—OBJECTIONS CONSIDERED
- THE PLACOID BRAIN.—EMBRYOTIC CHARACTERISTICS NOT NECESSARILY OF A LOW ORDER
- THE PROGRESS OF DEGRADATION.—ITS HISTORY
- EVIDENCE OF THE SILURIAN MOLLUSCS.—OF THE FOSSIL FLORA.—ANCIENT TREE
- SUPERPOSITION NOT PARENTAL RELATION.—THE BEGINNINGS OF LIFE
- LAMARCKIAN HYPOTHESIS OF THE ORIGIN OF PLANTS.—ITS CONSEQUENCES
- THE TWO FLORAS, MARINE AND TERRESTRIAL.—BEARING OF THE EXPERIENCE ARGUMENT
- THE DEVELOPMENT HYPOTHESIS IN ITS EMBRYOTIC STATE.—OLDER THAN ITS ALLEGED FOUNDATIONS
- FINAL CAUSES.—THEIR BEARING ON GEOLOGIC HISTORY.—CONCLUSION
CEREBRAL DEVELOPMENT OF THE EARLIER VERTEBRATA.—ITS APPARENT PRINCIPLE
Published online by Cambridge University Press: 29 August 2010
- Frontmatter
- TO THE READER
- Contents
- LIST OF WOOD-CUTS
- STROMNESS AND ITS ASTEROLEPIS.—THE LAKE OF STENNIS
- THE DEVELOPMENT HYPOTHESIS, AND ITS CONSEQUENCES
- THE RECENT HISTORY OF THE ASTEROLEPIS.—ITS FAMILY
- CEREBRAL DEVELOPMENT OF THE EARLIER VERTEBRATA.—ITS APPARENT PRINCIPLE
- THE ASTEROLEPIS.—ITS STRUCTURE, BULK, AND ASPECT
- FISHES OF THE SILURIAN ROCKS, UPPER AND LOWER.—THEIR RECENT HISTORY, ORDER, AND SIZE
- HIGH STANDING OF THE PLACOIDS.—OBJECTIONS CONSIDERED
- THE PLACOID BRAIN.—EMBRYOTIC CHARACTERISTICS NOT NECESSARILY OF A LOW ORDER
- THE PROGRESS OF DEGRADATION.—ITS HISTORY
- EVIDENCE OF THE SILURIAN MOLLUSCS.—OF THE FOSSIL FLORA.—ANCIENT TREE
- SUPERPOSITION NOT PARENTAL RELATION.—THE BEGINNINGS OF LIFE
- LAMARCKIAN HYPOTHESIS OF THE ORIGIN OF PLANTS.—ITS CONSEQUENCES
- THE TWO FLORAS, MARINE AND TERRESTRIAL.—BEARING OF THE EXPERIENCE ARGUMENT
- THE DEVELOPMENT HYPOTHESIS IN ITS EMBRYOTIC STATE.—OLDER THAN ITS ALLEGED FOUNDATIONS
- FINAL CAUSES.—THEIR BEARING ON GEOLOGIC HISTORY.—CONCLUSION
Summary
It is held by a class of naturalists, some of them of the highest standing, that the skulls of the vertebrata consist, like the columns to which they are attached, of vertebral joints, composed each, in the more typical forms of head, as they are in the trunk, of five parts or elements,—the centrum or body, the two spinous processes which enclose the spinal cord, and the two ribs. These cranial vertebræ, four in number, correspond, it is said, to the four senses that have their seat in the head: there is the nasal vertebra, the centrum of which is the vomer, its spinal processes the nasal and ethmoid bones, and its ribs the upper jaws; there is the ocular vertebra, the centrum of which is the anterior portion of the sphenoid bone, its spinal processes the frontals, and its ribs the under jaws; there is the lingual vertebra, the centrum of which is the posterior sphenoid bone, its spinal processes the parietals, and its ribs the hyoid and branchial bones,—portions of the skeleton largely developed in fishes; and, lastly, there is the auditory vertebra, the centrum of which is the base of the occipital bone, and its spinal processes the occipital crest, and which in the osseous fishes bears attached to it, as its ribs, the bones of the scapular ring.
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- Footprints of the CreatorOr, the Asterolepis of Stromness, pp. 38 - 69Publisher: Cambridge University PressPrint publication year: 2009First published in: 1849