TYRANNOSAURS

were the carnivorous members of the Sauria, or huge lizard-like reptiles living in the Tria ic era. Our knowledge of them is based upon fo il remains which have been found in the Cretaceous rocks of the western United States. According to information gleaned from the fo ils of the period. they were smaller than the better known members of this family, the Dinosaurs, which ‘were exclusively herbivorous. They had the same general reptilian characteristics as the crocodilians and the pterosattrians, and are closely related to the Ceratosaures group, which includes the horned Dinosaurs and land reptiles of the late Mesozoic Period. The largest fo il of this reptile was found in Montana, and indicated that the living creature was about 35 feet long and stood 18 feet high. Some people contend that it carried itself kangaroo fashion and even leaped through the air in pursuit of its le agile herbivorous neighbors. At the time these animals flourished, the western part of the U.S, was desert, marine deposits were forming on the Pacific coast, the Atlantic coast line was much further east than at present, and the iast volcanic erupous were taking place on the Atlantic slope.