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"The Scapula, or shoulder blade, is one of the two bones, the other being the clavicle, which form the pectoral arch or shoulder girdle." —Finley, 1917

Shoulder blade

"The Scapula, or shoulder blade, is one of the two bones, the other being the clavicle, which form the…

""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,…