Hardly had he spoken than the air before them seemed to thicken in a curious fashion. Lura gave a cry of alarm and pressed close to Damis. The sun's rays penetrated with difficulty through a patch of air directly before them. Gradually the mistiness began to assume a nebulous uncertain outline and separated itself into four distinct patches. The thickening air took on a silvery metallic gleam and four metallic cylinders made their appearance. Two of them were about eight feet in height and three feet in diameter. The other two were fully thirty feet in length and about the same diameter. On the top of each one was a projecting cap shaped like a mushroom and from it long tenuous streamers of metal ran the full length of each cylinder. From the ether came a thought wave which registered on the brains of all the Terrestrials. "The Grand Mognac of Mars sends his greeting and a welcome to the visitors from Earth," the message ran. "Before his envoys make their appearance before you, we wish to warn you to be prepared for a severe shock for their physical appearance is not that of the life with which you are familiar. I would suggest that you turn your heads while we emerge from our transporters." Obediently the Earthmen turned their gaze toward their ship until another thought wave ordered them to turn. Lura gave a cry of horror and Damis instinctively raised one of the Jovian ray tubes. Before them were huge figures which seemed to have stepped out of a nightmare, so grotesque were their forms. * * * * * The Martians had long slug-like bodies, twenty-five feet in length, from which projected a multiplicity of short legs. The legs on the rear portions of the bodies terminated in sucker-like disks on which they stood on the surface of the planet. The upper part of the body was raised from the ground and the legs terminated in forked appendages like hands. Stiff, coarse hair, brown in color, protruded from between brilliant green scales, edged with crimson. The heads were huge and misshapen and consisted mostly of eyes with a multitude of facets and huge jaws which worked incessantly as though the slugs were continually chewing on something. Nothing that the Earth could show resembled those monstrosities, although it flashed across Damis' mind that a hugely enlarged caricature of an intelligent caterpillar would bear some resemblance to the Martians. Another thought wave impinged on the consciousness of the Terrestrials.