... The crest, when little developed, arises from a fleshy mass, but, when much developed, from a hemispherical protuberance of the skull... 
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.」
...The protuberance in all Polish fowls occupies the same position, but differs much in size...
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.」
...The frontal bones, anteriorly to the protuberance, are, as in Dorkings, very broad, but in a variable degree...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Tegetmeier informs me that if chickens lately hatched be selected with a large bony protuberance, when adult they will have a large crest...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The head is ornamented with a handsomecrest of white feathers,springing from a fleshy protuberance, andfronted more or less deeply with black...
Robert Jennings 「Sheep, Swine, and Poultry」
...Gibba: a rounded protuberance or prominence...
John. B. Smith 「Explanation of Terms Used in Entomology」
...The absence of a tail—for that member is represented only by a very small protuberance or “knob”—imparts a character of lightness to his body...
Mayne Reid 「The Hunters' Feast」
...These beautiful andaffectionate human-like creatures of the water, wear, attached to theirfront flipper, a handsome comb-like protuberance...
Royal Dixon 「The Human Side of Animals」
...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」
...The jawlike pincers on itheld the limp form of an officer in its sucking grip, while above, ina protuberance like a gnarled horn, a great eye glared into Thorpe'swith devilish hatred...
Various 「Astounding Stories of Super-Science, June, 1930」
...I was aware that upon the mound-like protuberance of the room-floorwhere we were sitting, a door was opening...
Raymond King Cummings 「Wandl the Invader」
...The circle of swing is bigger, but the speed is somuch slower that the protuberance produced is only one-third of thatcaused by the monthly whirl; i...
Oliver Lodge 「Pioneers of Science」
...The attraction ofexternal bodies is able to grasp this protuberance, and thereby forcethe earth's axis of rotation to change its direction...
Robert Stawell Ball 「The Story of the Heavens」
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