"How does it create a vacuum?"
"By the contraction of a muscular pimple in the centre," said Tom, in a moment of inspiration.
"And what makes this pimple contract?"
Tom lost his head, and was about to say "electricity," when he happily checked himself and substituted "muscular action."
"Very good," said the examiners, and the student breathed again. The taller one returned to the charge, however, with, "And this muscle--is it composed of striped fibres or non-striped?"
"Non-striped," shrieked Tom at a venture, and both examiners rubbed their hands and murmured, "Very good, indeed!" at which Tom's hair began to lie a little flatter, and he ceased to feel as if he were in a Turkish bath.
"How many teeth has a rabbit?" the tall man asked suddenly.
"I don't know," the student answered with candour.
The two looked triumphantly at one another.
"He doesn't know!" cried the goggle-eyed one decisively.
"I should recommend you to count them the next time you have one for dinner," the other remarked. As this was evidently meant for a joke, Tom had the tact to laugh, and a very gruesome and awe-inspiring laugh it was too.
Then the candidate was badgered about the pterodactyl, and concerning the difference in anatomy between a bat and a bird, and about the lamprey, and the cartilaginous fishes, and the amphioxus. All these questions he answered more or less to the satisfaction of the examiners--generally less. When at last the little bell tinkled which was the sign for candidates to move on to other tables, the taller man leaned over a list in front of him and marked down upon it the following hieroglyphic:-"S. B.--."
This Tom's sharp eye at once detected, and he departed well pleased, for he knew that the "S. B." meant satis bene, and as to the minus sign after it, it mattered little to him whether he had done rather more than well or rather less. He had passed in zoology, and that was all which concerned him at present.