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124 was a wire grating, and near the floor was a sort of pipe running all around, so the smaller children could step up on this to look in—something which the big folk did not have to do.

"Be careful!" cried Nan, as Flossie leaned well over the edge to get a better look at the sea lion. "You might fall in."

"She could get a ride on his back if she did," said Freddie.

"Well, I'm not going to!" exclaimed Flossie, drawing back, a little frightened, as the seal splashed the water right under her, some drops going in her face.

They watched the seal for a while, went over to the other tanks, where some sturgeon and other big fish swam about, and then Freddie called:

"I want to see the big turtles! Where are they?"

"Over here," said Mr. Bobbsey, leading the way toward the south end of the building near the tank, where the green moray—a sort of big eel—was lying half in and half out of a piece of sewer pipe put va his tank to make