...The occipital protuberance,hollowed on its posterior surface, rises vertically, andrests upon the parietal bone, with which it forms an acuteangle... 
Édouard Cuyer 「Artistic Anatomy of Animals」
...At the present day all the breeds of Polish fowls have the great bony protuberance on their skulls, which includes part of the brain and supports the crest, equally developed in both sexes...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...He states that with fowls, when the crest is not much developed, it is supported on a fatty mass; but when much developed, it is always supported on a bony protuberance of variable size...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...He then expressly states that he never observed this protuberance in male fowls...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The degree to which the protuberance is ossified varies greatly, larger or smaller portions of bone being replaced by membrane...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Of Sultans (another Turkish breed) I examined two skulls; in that of the female the protuberance was much larger than in the male...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The close relation between the crest and the size of the bony protuberance is shown in another way; for Mr...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...This protuberance is the outer wall of thesound-chamber...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
... Remarkable in the first place by the protuberance of its thorax and the smallness of its head, the grub of the Anthrax acquires exceptional interest by its manner of feeding...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The falcon, for one moment, seemed intimidated, but soon returned to the charge, and, covering her body with one of her wings as a buckler, she struck her enemy with the bony protuberance of the other...
Samuel Griswold Goodrich 「Illustrative Anecdotes of the Animal Kingdom」
...In every case the first traceof the limb in the embryo is a very simple protuberance that grows out of theside of the hyposoma...
Ernst Haeckel 「The Evolution of Man」
...The sexual protuberance or phallus is the chief organ of the sexualsense (p...
Ernst Haeckel 「The Evolution of Man」
...The protuberance at its equator must, no doubt, beattributed to the high velocity with which the planet is rotating...
Robert Stawell Ball 「The Story of the Heavens」
...The earth's equatorial protuberance, being acted on by theattraction of the sun and moon, must disturb its axis of rotation in acalculated manner; and thus is produced the precession of the equinoxes...
Oliver Lodge 「Pioneers of Science」
...Knowing the sun's mass and distance, it was not difficult for Newton tocalculate the height of the protuberance caused by it in a pasty oceancovering the whole earth...
Oliver Lodge 「Pioneers of Science」
...Gradually, by reason of somedisturbing causes, a protuberance, a sort of bud, forms at one side, andthe great inchoate mass separates into two—one about eighty times asbig as the other...
Oliver Lodge 「Pioneers of Science」
...The sun takes twenty-five days tocomplete a rotation, and the protuberance appropriate to so low avelocity is not appreciable...
Robert Stawell Ball 「The Story of the Heavens」
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