She frowned, and bit her upper lip.

"Do you know what a Thermosaurus is?" she asked.

"If I am to guess," said I, "I guess it's a jellyfish."

"It's that big, ugly, horrible creature that I showed you in the shed!" cried Daisy impatiently.

"Eh!" I stammered.

"Not papier-maché either," she continued excitedly; "it's a real one."

This was pleasant news. I glanced instinctively at my rifle and then at the ocean.

"Well," said I at last, "it strikes me that you and I resemble a pair of Andromedas waiting to be swallowed. This rifle won't stop a beast, a live beast, like that Nibelungen dragon of yours."

"Yes, it will," she said; "it's not an ordinary rifle."

Then, for the first time, I noticed, just below the magazine, a cylindrical attachment that was strange to me.