The bird, its form and function (1906) (14568937128)

Identifier: birditsformfunct07beeb (find matches)

Title: The bird, its form and function

Year: 1906 (1900s)

Authors: Beebe, William, 1877-1962

Subjects: Birds Birds

Publisher: New York : Henry Holt

Contributing Library: Internet Archive

Digitizing Sponsor: Internet Archive

Text Appearing Before Image:

t in most ofthe ostrich-like birds, the tinamous, and in reptiles,where these bones are free throughout their entire length.We can readily make out the pubis as a slender bar of 9° The Bird Pu, Fig. 63 bone extending backward from the thigh-socket, sepa-rated from the ischium(except at the extremeend) by a long open slit.In other animals thesebones are as different inshape as can be imagined,but, almost without excep-tion, the position of eachis relatively the same. Theextreme extension, forwardand back, of the iliumabove the back-bone, thusjoining with more vertebrae,is directly connected withtwo-legged erect locomo-tion. A parallel conditionis found in some Dinosaurs—those extinct giant rep-tiles — certain of whichwalked more or less ontheir hind legs. Another fundamentalresemblance is found be-tween the thigh-girdles ofDinosaurs and other rep-tiles and that of a bird inthe egg. As is shown inFigs. 63-65, the pubis slants slightly forward in both reptile and embryo bird; but in

Text Appearing After Image:

Fig. 64.—Pelvic arch of an embryo bird,to show similarity of the two ascontrasted with Fig. (5.

Becken Der Vogel seine Form und Funktion 1906 Buchillustrationen Vogelkunde Vögel Zoologische Illustration Dinosaurier Paläontologie Bilder aus dem Internetarchiv

1906

Internet Archive

http://commons.wikimedia.org/

public domain