. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. FIG. 112.—PELVIS OF A YOUNG Alligator lurittx. A, ventral, and B, lateral view. B, fibrous band between the pubis and symphysis ischii; /<, foramen in the acetabulum, bounded posteriorly by the two processes, « and b, of the ilium and ischium respectively ; F, ischiopubic foramen ; G, acetabulum ; 77, ilium ; /•S ischium ; M, fibrous membrane extending between the anterior margin of the pubis and the last pair of "abdominal ribs" (.#/'); P, pubis ; Xy. symphysis of ischium ; *, indication of a forward growth
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. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. FIG. 112.—PELVIS OF A YOUNG Alligator lurittx. A, ventral, and B, lateral view. B, fibrous band between the pubis and symphysis ischii; /<, foramen in the acetabulum, bounded posteriorly by the two processes, « and b, of the ilium and ischium respectively ; F, ischiopubic foramen ; G, acetabulum ; 77, ilium ; /•S ischium ; M, fibrous membrane extending between the anterior margin of the pubis and the last pair of "abdominal ribs" (.#/'); P, pubis ; Xy. symphysis of ischium ; *, indication of a forward growth of the ilium, such as is met with in Dinosaurians and Birds ; f, pars acetabularis, which is interposed between the process a of the ilium and the pubis ; /, //, first and second sacral vertebra?. directed backwards, parallel to the ischium and postacetabular process of the ilium. The preacetabular portion of the ilium extends forward for a considerable distance, and a number of vertebrae belonging to other than the true s;icral region become- secondarily connected with the ilium (cf. p. 60). The acetabulum is perforated, and the pars acetabularis forms a pectineal pro- cess which is retained in the adult in Apteryx (Fig. 113). The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, Macmillan and co. , limited