ed mouthed dinosaur was perilously near. So close that
Carruthers could smell its great, glistening body. The odor was musky
and foul.

Stumbling blindly he attempted to widen the distance between himself
and his pursuer. But the hungry dinosaur pounded steadily on its
course. There was no getting away from it. Its beady eyes sought out
its prey and its keen smell told it exactly where the earth beings
were.

On and on staggered Carruthers. The extra burden of the girl hampered
his movements. Unseen roots tripped him time and time again. Each time
he scrambled to his feet and picked up the unconscious girl. Briars
tore at his clothing and stung his hands.

The underbrush was thickening. A warm, dank smell clung to the
vegetation now almost tropical in nature. Beads of sweat rolled down
the man's forehead and into his eyes. But the horrible fear of those
red, dripping jaws spurred him to renewed efforts.

He doubled to the left, hoping to throw the animal off his tracks. The
undergrowth seemed to thin out at this point. Renewed hope flowed
through the young scientist's blood. He stumbled on blindly, scarce
watching where his feet were taking him. A sigh of relief came to his
lips. Ahead of him he saw a clearing. His stride lengthened and he
broke into a shambling run.

* * * * *

Then it was he saw, towering walls rising up on both sides of
him--steep walls that he could never scale, even if alone. He tried to
change his course, but the huge bulk of the pursuing dinosaur
effectively blocked his path. There was no alternative but to push on
and pray for an opening in the rugged cliffs.

Abruptly a sigh of despair escaped his lips. The walls of the canyon
narrowed suddenly, and across it stretched a wall of bare rock. He
realized too late that he had returned to the base of the plateau
where he had spent the night. The grim, towering walls hemmed him in
completely from three sides. At the fourth side bulked the dinosaur,
coming slowly, ponderously.

Beady eyes peered down cunningly at the helpless man and woman.
Confident now that its prey couldn't escape, it extended its huge bulk
across the narrow canyon for a leisurely killing.

Carruthers glared at the monster with fear-distended eyes. In his
heart he realized that there was no escape. He had no means of
defense, no way to combat the huge monster but flight. And even that
was now denied him.

Closer and closer inched the kil