PELVIC ARCH. 



97 



FIG. 83A. PELVIS OF A SIX-DAYS' CHICK. (After A. Johnson.) 

 Jl, ilium ; Js, ischium ; pb, pubis ; pp, pectineal process of pnbis. 



f 



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 FIG. 83B. DIAGRAM SHOWING THE RELATIONS OF THE PELVIC BOXES TO THE 



ACETABCLUM. 



J, ilium ; Js, ischium ; P, pubis ; A, acetabular bone ; Ac, acetabulum. 



FIG. 84. PELVIS OF Echidna. (From the left side.) (After Gegenbaur.) 

 Jl, ilium ; Is, ischium ; P, pubis ; Om, marsupial bones ; Fo, obturator foramen. 



H 



