He went to the other side of the plane, he scanned the ground all about him. Jimmy had disappeared. It was evident that he was nowhere near, for Tommy could see the whole of the lower scope of the bowl on every side of him. He had walked away--or he had been carried away! Tommy thought of the shrimp, and shuddered. What other fearsome monsters might inhabit that extraordinary valley? He sat down, leaning against the wreck of the fuselage, and tried to adjust his mind, tried to keep himself from going mad. He knew now that the flight had been no dream, that he was a member of his uncle's expedition, that he had flown with Jim toward the pole, had crashed in a vacuum. But where was Jim? And how were they going to get out of the damn place? Something like a heap of stones not far away attracted Tommy's attention. Perhaps Jim Dodd was lying behind that. Once more Tommy got upon his feet and began walking toward it. On the way, he stumbled against the sharp edge of something that protruded from the ground. It cut his leg sharply, and, with a curse, he began rubbing his shin and looking at the thing. Then he saw that it was another of the fossil shells, half-buried in the marshy ooze on which he was treading. The ground in this lower part of the valley was a swamp, on account of the very fine mist falling from the fog clouds that surrounded it impenetrably on every side. Then Tommy came upon another shell, and then another. And now he saw that there were piles of what he had taken to be rock everywhere, and that this was not rock but great heaps of the shells, all equally intact. Hundreds of thousands of the prehistoric beetles must have died in that valley, perhaps overcome by some cataclysm. * * * * * Tommy examined the heap near which he stood; he yelled Dodd's name, but again no answer came. Instead, something began to stir among the heaps of shells. For a moment Tommy hoped against hope that it was Dodd, but it wasn't Dodd. _It was a living beetle!_ A beetle fully five feet high as it stood erect, a pair of enormous wings outspread. And the head, which was larger than a man's, was the most frightful object Tommy had ever seen. Jim Dodd would have said at once that this was one of the Curculionidae, or snout beetles, for a prolongation of the head between the eyes formed a sort of beak a foot in length. The mouth, which opened downward, was armed with terrific mandibles, while the huge, compound eyes looked like enormous crystals of cut glass. Immediately in front of the eyes were two mandibles as long as a man's arms, with feathery processes at the ends. In addition to these there were three pairs of legs, the front pair as long as a man's, the hind pair almost as long as a horse's. * * * * *