File:Cold-blooded vertebrates- part I. Fishes (1930) (20474578440).jpg

Title: Cold-blooded vertebrates: part I. Fishes
Identifier: coldbloodedverte08hild (find matches)
Year: 1930 (1930s)
Authors: Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Whitney, 1874-; Cochran, Doris M. (Doris Mable), 1898-1968
Subjects: Fishes; Amphibians; Reptiles
Publisher: (New York, Smithsonian institution series, inc. )
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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REPTILES order of reptile had left them behind. Some contended that the teeth were those of dinosaurs and had no con- nection with the extinct lizards, while others adhered to Dr. Leidy's theory concerning them. So the matter stood until 1921, when Mr. George F. Sternberg found in Upper
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Fig. 67. Sketch restoration of the skeleton of Troodon validus

Cretaceous deposits in Alberta the partial skeleton of a reptile, including a complete skull in whose jaws were teeth of the Troodon pattern (Fig. 67). This skull, now in the University of Alberta Museum, Edmonton, bears unmistakable evidence that the animal of whom it was once a vital part belonged to that great group of dino- saurs we have just been discussing—the Predentata. This evidence is the predentate bone, joining the two lower jaw bones, a feature peculiar to this group. Thus nearly sixty-five years after the discovery of the first Troodon tooth, the true identity of the animal to which it belonged was revealed. (246)

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