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"Typical passerine sternum, pectoral arches, and sternal ends of ribs; from the robin, Turdus migratorius, nat. size; Dr. R.W. Shufeldt, U.S.A. Sternum single-notched, with prominent costal processes and forked manubrium; five ribs reaching sternum, one rib "floating"" Elliot Coues, 1884

Sternum of a Robin

"Typical passerine sternum, pectoral arches, and sternal ends of ribs; from the robin, Turdus migratorius,…

"Fig 56 - Axial skeleton, minus the skull, of an owl, Asio wilsonianus, life size; from nature by Dr. R.W. Shufeldt, USA. at, atlas; ax,axis; cv, cervical vertebrae; c, c', cervical ribs, or free pleurapophyses; dv, dorsal vertebrae, excepting the last one, which joins the sacrum; R, two of the six true ribs (pleurapophyses), whereof sr is sacral; u, one of the five uncinate processes or epipleura; cr, two of the six sternal ribs(haemapophyses), whereof the sixth floats; p, pelvic or sacral region of the spine, comprehending one dorsal, and several lumbar, sacral proper, and urosacral vertebrae; I ilium; Is, ischium; P pubis; a, acetabulum; in, ischio-iliac foremen; o, obturator foramen; clv, caudal or coccygeal vertebrae, whereof py is the pygostyle; s, scapula; ohs, os humero-scapulare; cl, clavicle; C, coracoid; S, sternum." Elliot Coues, 1884

Axial Skeleton

"Fig 56 - Axial skeleton, minus the skull, of an owl, Asio wilsonianus, life size; from nature by Dr.…

"Fig 55. - Actual section of the body in the thoracic region of a bird. N, neural canal; H, haemal canal; c, centrum of a dorsal vertebra; hy, hypapophysis; d, diapophysis; z, zygapophysis; ns, neural spine; r, pleurapophysis, or vertebral part of a free rib, bearing u, uncinate process or epipleura; cr, haemapophyses; or sternal part of the same; st, section of the sternum or breast-bone (haemal spine). Designed by Dr. R. W. Shufeldt, USA. This figure shows such a section, made across the thoracic or chest-region of the trunk. Here the upper ring (neural) is contracted, only surrounding the slender spinal cord, while the lower ring is expanded to enclose the heart and lungs." Elliot Coues, 1884

The Axial Skeleton

"Fig 55. - Actual section of the body in the thoracic region of a bird. N, neural canal; H, haemal canal;…

"Cygynus. White Swans. Neck of extreme length. Trachea normally entering sternum. Bill tuberculate or not, the skinny covering in the adults reaching to the eyes; not shorter than head, very high at base, where deeper than wide, broader and flattening toward the rounded end; culminal ridge at base about horizontal, very broad and flat or even excavated, the sides of the bill there nearly vertical. Nostrils near middle of bill, high up. Leg behind centre of equilibrium when the body is horizontal. Tibia bare below. Tarsus shorter than middle toe and claw, entirely reticulate; toes long, with full webs, the anterior reticulate on top for a distance, then scutellate. Hallux small, elevate, with slight lobe. Wings very long and ample. Tail short, rounded or wedged, of twenty or twenty-four feathers. Size large: adults entirely white, with black bill and feet, former usually in part yellow." Elliot Coues, 1884

Mute Swan

"Cygynus. White Swans. Neck of extreme length. Trachea normally entering sternum. Bill tuberculate or…

"Phalacrocorax bicristatus. Red-Faced Cormorant. Sternum and the shoulder from the skeleton of a Cormorant." Elliot Coues, 1884

Cormorant Sternum and Shoulder

"Phalacrocorax bicristatus. Red-Faced Cormorant. Sternum and the shoulder from the skeleton of a Cormorant."…

"Very generally, in cranes and swans, the trachea enters the keel of the sternum, which is excavated to receive it, and where it forms one or more coils before emerging to pass to the lungs. This curious winding is carried to the extreme in our Grus americanus, the whoopong crane, in which the wind-pipe is about as long as the whole bird, and about half of it - over two feet of it! - is coiled away in the breast-bone." Elliot Coues

Whooping Crane Windpipe

"Very generally, in cranes and swans, the trachea enters the keel of the sternum, which is excavated…

"Coiling of the windpipe in the sternum of Grus canadensis. Sandhill Crane." Elliot Coues, 1884

Sandhill Crane Windpipe

"Coiling of the windpipe in the sternum of Grus canadensis. Sandhill Crane." Elliot Coues, 1884

"a, b, c, d, inferior laryngeal or syringeal muscles, not well made out in this figure; But typical oscine arrangement (acromyodian) is perceived, inasmuch as anterior (a) and posterior (d) intrinsic muscular masses go to ends of the first tracheal half-ring, at b and c; the extrinsic slip e passing to sternum." Elliot Coues, 1884

The Laryngeal Muscles of a Rook

"a, b, c, d, inferior laryngeal or syringeal muscles, not well made out in this figure; But typical…

""Views of sternum and pectoral arch of the ptarmigan, Lagapus albus, reduced. Lateral view, with the bones upside down. a, sternum or breast-bone showing two long slender lateral processes; b, ends of sternal ribs; c, ends of humerous, or upper arm-bone, near the shoulder-joint; d, scapula, or shoulder-blade; e, coracoid; f, merry-thought, or furculum." Elliot Coues, 1884

Willow Grouse Sternum

""Views of sternum and pectoral arch of the ptarmigan, Lagapus albus, reduced. Lateral view, with the…

"Views of sternum and pectoral arch of the ptarmigan, Lagapus albus, reduced; viewed from below. a, sternum or breast-bone showing two long slender lateral processes; b, ends of sternal ribs; c, ends of humerous, or upper arm-bone, near the shoulder-joint; d, scapula, or shoulder-blade; e, coracoid; f, merry-thought, or furculum." Elliot Coues, 1884

Willow Grouse Sternum

"Views of sternum and pectoral arch of the ptarmigan, Lagapus albus, reduced; viewed from below. a,…