. Key to North American birds [microform] : containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland. Birds; Ornithology; Oiseaux; Ornithologie. Flli. Fi08. 90-95. — of carotid arteries of birds: A, root of aorta; a, arch of aorta, to the right siilo; li, left Innominate; ri, rigl\t Innominate ; Is, left subclavian ; rs, right subclavian; Ic, left carotid; re, right carotid. (1) Fig. 90. Aves hicarnlldince normalcs, with two carotids, botli alike. (2) Fig. 9
. Key to North American birds [microform] : containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland. Birds; Ornithology; Oiseaux; Ornithologie. Flli. Fi08. 90-95. — of carotid arteries of birds: A, root of aorta; a, arch of aorta, to the right siilo; li, left Innominate; ri, rigl\t Innominate ; Is, left subclavian ; rs, right subclavian; Ic, left carotid; re, right carotid. (1) Fig. 90. Aves hicarnlldince normalcs, with two carotids, botli alike. (2) Fig. 91. y^i' lavo-carotidimr, with It't'l carotid only. (3) Fig. 92. Arrs hicnrotidina abnormal'S, certain i)arrots, with two carotids, not alike. (4, 0, i'\ Area poyiiimcto-carntiriinw, with two carotids, which speedily unite in one. (4) Fig. 93, bittern, both alike. (.1) Fig. 94, flamingo, left very small. {«) Fig. 9.'>, cockatoo, right very small. (Copied by Shufeldt from Garrod.) numerical proportion of Passerine genera makes (2) the most frequent arrangement. There is but one carotid in all Passercs as far as known; in most Ci/pselidcc; in Trogonidec, Mcrop'uhr, Upupidte, Bhamphnstida;, some Psittaci, the Tiirnicida;, Megapodidce, Podicipedida, Alcidtr, SheidcE, Apterygidce. Thus in Passeres, Columha;, Accipitres, GralleB, and Ansercs, the carotid arrangement is an ordinal character, all but the first named of tliosc great groujis having two. The character separates most of the families of " Picarian" birds, and also dis- tinguishes the families Pha^iicopteridcc, Megapodidce, Craddw, Turnicida;, Podicipedidw, tnid family groups of the Batita;, from among one another. It is apparently only a generic charac- ter in Psittaci, and in Ci/pselidcn, Ardcidtc and Alcidce. Reaching the skull, the carotids burrow in the bone, between the basitemporal plate and the true floor of the skull, and enter the cranial cavity by the " sella turcica" (the original pitu
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
