SOURCE: Tarzan at the Earth's Core (Blue Book, September 1929)

DESCRIPTION: "The distance between Jason and the stegosaurus was over great for a revolver shot, but the American hoped that he might at least divert the attention of the reptile from its prey and even, perhaps, frighten it away by the unaccustomed sound of the report of the weapon, and so he fired twice in rapid succession as he leaped downward toward the bottom of the canyon. That at least one of the shots struck the reptile was evidenced by the fact that it veered from its course, simultaneously emitting a loud, screaming sound. Attracted to Jason by the report of the revolver and evidently attributing its hurt to this new enemy, the reptile, using its tail as a rudder and tilting its spine plates up on one side, veered in the direction of the American. As the two shots shattered the silence of the canyon, the warrior turned his eyes in the direction of the man leaping down the declivity toward him, and then he saw the reptile veer in the direction of the newcomer.
Heredity and training, coupled with experience, had taught this primitive savage that every man’s hand was against him, unless that man was a member of his own tribe. Only upon a single occasion in his life had experience controverted these teachings, and so it seemed inconceivable that this stranger, whom he immediately recognized as such, was deliberately risking his life in an effort to succor him; yet there seemed no other explanation, and so the perplexed warrior, instead of seeking to escape now that the attention of the reptile was diverted from him, ran swiftly toward Jason to join forces with him in combating the attack of the creature. From the instant that the stegosaurus had leaped from the summit of the cliff, it had hurtled through the air with a speed which seemed entirely out of proportion to its tremendous bulk, so that all that had transpired in the meantime had occupied but a few moments of time, and Jason Gridley found himself facing this onrushing death almost before he had had time to speculate upon the possible results of his venturesome interference. With wide distended jaws and uttering piercing shrieks, the terrifying creature shot toward him, but now at last it presented an easy target and Jason Gridley was entirely competent to take advantage of the altered situation. He fired rapidly with both weapons, trying to reach the tiny brain, at the location of which he could only guess and for which his bullets were searching through the roof of the opened mouth. His greatest hope, however, was that the beast could not for long face that terrific fusillade of shots, and in this he was right. The strange and terrifying sound and the pain and shock of the bullets tearing into its skull proved too much for the stegosaurus. Scarcely half a dozen feet from Gridley it swerved upward and passed over his head, receiving two or three bullets in its belly as it did so. Still shrieking with rage and pain it glided to the ground beyond him. Almost immediately it turned to renew the attack. This time it came upon its four feet, and Jason saw that it was likely to prove fully as formidable upon the ground as it had been in the air, for considering its tremendous bulk it moved with great agility and speed. " (Tarzan at the Earth's Core by Edgar Rice Burroughs)

NOTES: Burroughs deviates from scientific experience with this one. His stegasaur is carnivorous, agile and glides off cliffs with its plates! Burroughs is usualy pretty up-to-date for hsi time. Perhaps this was some new crack-pot theory?

HISTORY: Later Kenneth Robeson (Lester Dent) would have similarly silly dinosaurs in his second Doc Savage (novel The Land of Terror, April 1933) four years later with kangaroo jumping T rex and carnivorous Stegos. Must have been going around.