We lay on a glistening plain of bluish hue which stretched without a break as far as we could see. Not a thing broke the monotony of our vision. We turned to the opposite window. How can I describe the sight which met our horrified gaze? On the plain before us lay a huge purple monstrosity of gargantuan dimensions. The thing was a shapeless mass, only the four huge eyes standing out regarding us balefully. The mass was continually changing its outline and, as we watched, a long streamer extended itself from the body toward us. Over and around the flyer the feeler went, while green and red colors played over first one and then another of the huge eyes before us. The feeler wrapped itself around the flyer and we were lifted into the air toward those horrible eyes. We had almost reached them when the thing dropped us. We fell to the plain with a crash. We staggered to our feet again and looked out. Our captor was battling for its life. * * * * * Its attacker was a smaller thing of a brilliant green hue, striped and mottled with blue and yellow. While our captor was almost formless, the newcomer had a very definite shape. It resembled a cross between a bird and a lizard, its shape resembling a bird, as did tiny rudimentary wings and a long beak, while the scaly covering and the fact that it had four legs instead of two bore out the idea that it might be a lizard. Its huge birdlike beak was armed with three rows of long sharp teeth with which it was tearing at our captor. The purple amoeba was holding its assailant with a dozen of its thrown out feelers which were wrapped about the body and legs of the green horror. The whole battle was conducted in absolute silence. "Now's our chance, Jim!" I cried. "Get away from here while that dragon has the amoeba busy!" He jumped to the control levers of the flyer and pulled the starting switch well forward. The shock of the sudden start hurled me to the floor, but from where I fell I was able to watch the battle on the plain below us. It raged with uninterrupted fury and I felt certain of our escape when, with a shock which hurled both Jim and me to the ceiling, the flyer stopped. We fell back to the floor and I reflected that it was well for us that the interior of the flyer was so well padded. Had it not been, our bones would have been broken a dozen times by the shocks to which we had been subjected. "What now?" I asked as I painfully struggled to my feet. "Another of those purple amoebas," replied Jim from the vantage point of a window. "He's looking us over as if he were trying to decide whether we are edible or not." * * * * *