omething in the quality of the girl's frightened tones brought the man back to normal. He fought against the overwhelming desire to possess with all the force of his nature. And the better half triumphed. No longer was he an animal, but a reasoning human being. With a faint sigh he released her and wiped a hand across his dripping forehead.

"I'm sorry, Nan," he murmured. "That great brute drove me mad for an instant. I'm all right now."

Together they stood in the electron night and watched death creep closer and closer. The plateau was entirely surrounded with flames now and the heat was increasing with each passing moment. As it increased they backed towards the center.

From under their feet came the choking cries of the apemen. They had returned to the cavern only to be overcome by smoke fumes. While yet the earth people stood there waiting and watching the red death creep nearer, the path leading downward into the jungle became a mass of moving shadows.

"The dinosaurs!" cried Nanette. "Oh, Aaron! We are lost!"

"Steady, girl," soothed the man. "If we stand still they might not see us in the dark. The smoke will destroy our scent."

But as the minutes passed the herd of monsters increased. They crowded along the path and spread out over the top of the plateau. Once again the smell of their glistening bodies fouled the nostrils of the earth people.

Slowly Carruthers guided Nanette back towards the ring of rocks—perhaps the barrier would serve to keep the animals away. He scrambled across one of the boulders and pulled the girl after him. As he did so, a violent subterranean action shook the electron from one end to the other.