. 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. DEFINITION OF BIRDS. es ichnites, — the fossils so called because supposed to indicate the presence of Birds by their fddt-prints, were discovered about the year 1835 in the Triassic formation in Connecticut. Hut the creatures which made these tracks are now reasonably believed to have been all I )iuosauriau Reptiles. The oldest o
. 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. DEFINITION OF BIRDS. es ichnites, — the fossils so called because supposed to indicate the presence of Birds by their fddt-prints, were discovered about the year 1835 in the Triassic formation in Connecticut. Hut the creatures which made these tracks are now reasonably believed to have been all I )iuosauriau Reptiles. The oldest ornUhoUte, or fossil certainly known to be that of a true Hinl, is the famous ArcheBoptenjx, found by Andreas Wagner in 18(51 in the Orditic shite of Sdlenhofen in Bavaria. This has a long lizard-like tail of twenty vcrtebrie, from each of which springs a well-developed/ea</icr on each side; feathers of the wings are also well preserved;. FiQ. IS. — Restoration ot Heiperomia regalit. After Mursli. bones of the hand are not fused together, as they are in recent Birds; and the jaws Vtcar true teeth. This Bird has served as tlie basis of one of the primary divisions of the class Aves; though it has many reptilian characters, it is a true Bird. The great t;a]) between this ancient Avian and latter-day birds has been to 8om(! extent bridged by Marsh's discovery and splendid restoration of Birds from the Cretaceous fornnitions of North America, such genera as Tchthi/ornis and Hesperornis forming types of two other primary divisions of the class, Odon- totormm and Odontolctc, or Birds with teeth in sockets, and tliose with teeth in grooves. In both genera the tail is short, as in ordinary birds. In Ichthyornis, though the wings are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coues, Elliott, 1842-1899. Bo
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
