"You are right, Uncle," I remarked. "Providence appears to have designed the preservation in this vast and mysterious hothouse of antediluvian plants, to prove the sagacity of learned men in figuring them so marvelously on paper."

"Well said, my boy—very well said; it is indeed a mighty hothouse. But you would also be within the bounds of reason and common sense, if you added that it is also a vast menagerie."

I looked rather anxiously around. If the animals were as exaggerated as the plants, the matter would certainly be serious.

"A menagerie?"

"Doubtless. Look at the dust we are treading under foot—behold the bones with which the whole soil of the seashore is covered—"

"Bones," I replied, "yes, certainly, the bones of antediluvian animals."

I stooped down as I spoke, and picked up one or two singular remains, relics of a bygone age. It was easy to give a name to these gigantic bones, in some instances as big as trunks of trees.

"Here is, clearly, the lower jawbone of a mastodon," I cried, almost as warmly and enthusiastically as my uncle; "here are the molars of the Dinotherium; here is a leg bone which belonged to the Megatherium. You are right, Uncle, it is indeed a menagerie; for the mighty animals to which these bones once belonged, have lived and died on the shores of this subterranean sea, under the shadow of these plants. Look, yonder are whole skeletons—and yet—"

"And yet, nephew?" said my uncle, noticing that I suddenly came to a full stop.

"I do not understand the presence of such beasts in granite caverns, however vast and prodigious," was my reply.