. Key to North American birds. 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 and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. DEFINITION OF BIRDS'. 63 ichnites,—the fossils so called because supposed to iudicate the presence of Birds hy tlicir foot-prints, were discovered abtiut the yea

. Key to North American birds. 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 and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. DEFINITION OF BIRDS'. 63 ichnites,—the fossils so called because supposed to iudicate the presence of Birds hy tlicir foot-prints, were discovered abtiut the yea Stock Photo
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The Book Worm / Alamy Stock Photo

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RDC0PR

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7.2 MB (241.9 KB Compressed download)

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1412 x 1770 px | 23.9 x 30 cm | 9.4 x 11.8 inches | 150dpi

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. Key to North American birds. 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 and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. DEFINITION OF BIRDS'. 63 ichnites,—the fossils so called because supposed to iudicate the presence of Birds hy tlicir foot-prints, were discovered abtiut the year 1835 in the Triassic formation in Connecticut. But the creatures which made these tracks are now reasonably believed to have been all Dinosaurian Reptiles. The oldest ornitholite, or fossil certainly known to be that of a true Bird, is the famous Arclueojitenjx, found by Andreas Wagner in 1861 in the Oolitic slate (jf Solenhofen in Bavaria. This has a long lizard-like tail of twenty vertebra?, from each of which springs a well-developed/eaWier on each side; feathers of the wings are also well preserved;. Fig. 15.—Restoration of Hesperornis regalls. After ^larsh. bones of the hand are not fused together, as they are in recent Birds ; and the jaws bear true teeth. This Bird has served as tlic basis of one of the primary divisions of the class Aves : though it has many reptilian characters, it is a true Bird. The great ga]) between this ancient Avian and latter-day birds has been to some extent bridged by Marsli's discovery and splendid restoration of Birds from the Cretaceous formations of North America, such genera as Ichthyornis and Hesperornis forming types of two other primary divisions of the class, Odon- totormee and Odontolcce, or Birds with teeth in s<ickets, and those with teeth in grooves. In both genera the tail is short, as in ordinary birds. In Ichthi/omis, thougli the wings are. Please note that these images are extracted from scanned page images that may h

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