File:A dictionary of birds (1893) (14564758559).jpg

Identifier: dictionaryofbird00newt (find matches)
Title: A dictionary of birds
Year: 1893 (1890s)
Authors: Newton, Alfred, 1829-1907 Gadow, Hans, 1855- Lydekker, Richard, 1849-1915 Roy, Charles S. (Charles Smart) Shufeldt, Robert W. (Robert Wilson), 1850-1934
Subjects: Birds
Publisher: London, A. and C. Black
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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edalmost always forms a foramen^ called the J. ohturatum, because itserves for the passage of the tendon of the m. obturator and the n.obturatorius (page 625), which supplies that muscle, and the m. pub-ischio-femoralis (page 611), or principal adductor of the thigh. Therest of the opposed margins of ischium and pubis are connected with each other to a variableextent, either by mem-branes only or, if thebones touch, by more orless extensive ossification,which in extreme cases, asin some Anatidx, leads tothe obliteration of themiddle portion of theshaft of the pubis, so thatits distal portion appearsin a prepared skeleton asa separate bone. The dis-tal end of the pubis ismostly bowed inwards andbroadened, serving for theattachment of the lateri-ventral muscles of the tail(m. pubo - cocajgeus). InSiridhio only the end ofthe pubis meets that ofthe other side, forming adagger-shaped symphysisupon which rests a greatpart of the weight of theabdominal intestines. Thespina pubica or anterior
Text Appearing After Image:
Pavo cristatus. COLYMBUS ARCTICUS. 1. II. the Sacral Vertebne; 0.1-5, Cnual Vertebra.; Cd. PJO^^^S of the OS publs l-5,Caudal;C^.i(;p.2,Capitularattachinentofthelast often Called the pectineal free ribs; Is. Ischiadic Vertebrae; I.S. Postsacral A;/ p_ (350 fi*. 4 p.) isVertebrsB; Rec.il. Iliac recess; Tb. Tubercular part i i • 11 r i. of the rib. morphologically of great interest, because it is theelement which in Dinosaurs is described as the pra3pubis, whilein recent Reptiles it is represented by the pubis proper, the pubis of Birds being in reality homologous with the postpubisof Dinosaurs and the processus lateralis pubis of other Reptiles. Itserves for the origin of the ambip:ns muscle (page 11), thoughthat not unfrequently extends to the adjoining part of ilium, orfurther down to the shaft of the pubis, and hence has beenpreserved when that muscle is present; but the process is very SKELETON 863 variable in extent, being comparatively largest in the Gallinse andsome of the Cuc

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