In Larry Niven's The Flight of the Horse collection, the Vivarium contains a number of extinct animals collected from the past, including a horse and a Gila monster, but also an elephant:
The cage they were passing was labeled:
ELEPHANT - Retrieved from the year 700 AnteAtomic, approximately, from the region of India, Earth, EXTINCT.
The wrinkled grey beast watched them go with sleepy indifference. His air of inhuman age and wisdom was such that he must have recognized Svetz as his captor. But he didn't care.
the time travel machine is actually travelling into a fantasy world, and the "animals" are legendary creatures mistaken for natural ones: the horse is really a unicorn, the Gila monster is a dragon, and while the ostrich is an ostrich it also turns out to be descended from a Roc.
What about the elephant?
That is, what sort of legendary creature is it really? Is there an elephant-like creature from India's mythology, perhaps, since the inscription mentions India? Or is it a real elephant, an exception to the rule?