But this hard body might be a bony carapace, like that of the antediluvian animals; and I should be free to class this monster among amphibious reptiles, such as tortoises or alligators. Well, no! the blackish back that supported me was smooth, polished, without scales. The blow produced a metallic sound; and incredible though it may be, it seemed, I might say, as if it was made of riveted plates. There was no doubt about it! This monster, this natural phenomenon that had puzzled the learned world, and overthrown and misled the imagination of seamen of both hemispheres, it must be owned, a still more astonishing phenomenon, inasmuch as it was a simply human construction. We had no time to lose, however. We were lying upon the back of a sort of submarine boat, which appeared (as far as I could judge) like a huge fish of steel. Ned Land’s mind was made up on this point. Conseil and I could only agree with him. Just then a bubbling began at the back of this strange thing (which was evidently propelled by a screw), and it began to move. We had only just time to seize hold of the upper part, which rose about seven feet out of the water, and happily its speed was not great. “As long as it sails horizontally,” muttered Ned Land, “I do not mind; but if it takes a fancy to dive, I would not give two straws for my life.”