. On the anatomy of vertebrates [electronic resource] . OSSEOUS SYSTEM OF AVES. 21 perforated, are afforded by Swifts, Humming-birds, fig. 18, someEagles (Aquila, Pandion, Halicetus) and Petrels ( Thalassidroma),in connection with excessive developement of the bone and greatpowers of flight; also by the Emeu, Rhea, Cassowary, and Notor-nis, fig. 16, where the bone stops short of the parts exhibiting thenotches or grooves in birds of flight, and retains almost the smalllacertian proportions, fig. 17, a. The oblong and not very largesternum of some Cockatoos ( Calyptorhynclius) is entire; in the
. On the anatomy of vertebrates [electronic resource] . OSSEOUS SYSTEM OF AVES. 21 perforated, are afforded by Swifts, Humming-birds, fig. 18, someEagles (Aquila, Pandion, Halicetus) and Petrels ( Thalassidroma),in connection with excessive developement of the bone and greatpowers of flight; also by the Emeu, Rhea, Cassowary, and Notor-nis, fig. 16, where the bone stops short of the parts exhibiting thenotches or grooves in birds of flight, and retains almost the smalllacertian proportions, fig. 17, a. The oblong and not very largesternum of some Cockatoos ( Calyptorhynclius) is entire; in the 16 17. Cursorial sternum, Notornis. Lacertian sternum, Iguana. Balearic and Demoiselle Cranes, in the Ibis ( Tantalus Ibis); inthe Agami (Psophia), the sternum is long, narrow, and broad sternum of the Frigate-bird ( Tachypetes) and the longsternum of the wingless Auk (Alca impennis) are also The anterior margin of the sternal body is impressed by the arti-cular cavities for the coracoids. In Notornis, fig. 16, b, Dinornisand Apteryx they are small shallow depressions, near the outerangles: they are similarly situated, but longer and deeper, in theRhea and Cassowary ; are more extended and with a shorter inter-space in the Ostrich. In birds of flight they are deep grooves,with the upper or hinder border thickened and convex in many,affording a concavo-convex surface for the broad end of the mostly meet at the midline ; they are continuous, perforatingthe base of the manubrium, in some Gallince (Perdix); and havetheir medial ends decussating, extending one in
Size: 2033px × 1229px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes
