. Biology in America. Biology. 126 Biology in America Plains area of the West. In the early Mesozoic rocks of this region are found some of the most extensive dinosaur remains throujxhout the woi'ld. althoupfh these are of virtually world- wide distri])uti()n. And here too has been the happy hunting ground of the palaeontologist, whose labors have revealed to us the life of the long ago. In size the dinosaurs ranged from little fellows about a foot or two long to enormous beasts, veritable Goliaths among animals. The largest of all was Brontosaurus, the thunder lizard, who reached a length of
. Biology in America. Biology. 126 Biology in America Plains area of the West. In the early Mesozoic rocks of this region are found some of the most extensive dinosaur remains throujxhout the woi'ld. althoupfh these are of virtually world- wide distri])uti()n. And here too has been the happy hunting ground of the palaeontologist, whose labors have revealed to us the life of the long ago. In size the dinosaurs ranged from little fellows about a foot or two long to enormous beasts, veritable Goliaths among animals. The largest of all was Brontosaurus, the thunder lizard, who reached a length of sixty feet, and stood fourteen feet high, with a thigh ])one the height of a man. ^lany of them were armeil wath great knife-like plates and spines u])on. DixosAUR Tracks (ointisii of the Amcriiiin Miixcum of Xdlural Hintonj. the back and tail. Among these were the stegosaurs nr armored lizards, the largest of whose plates were two feet in height and length, w^hile near the end of the powerful tail, eight or ten feet long, projected two pairs of vicious spines nearly three feet long. The three-horned dinosaur, Tricer- atops, who S(jme millions cf years ago inhabited what are now the plains of the Dakotas, Wyoming, Montana and Colorado, bore a horn over either eye and one on his snout, like the horn of a rhinoceros, and a great fringed shield upon his neck; while many another was equipped with armor more bizarre perhaps than practical in the battle of life. Many however were naked, so that as a protective adaptation these various plates and spines seem to have had but doubtful 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 Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger
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