Coelacanthine

It must always be remembered that although to an adult a particular belief may seem like a coelacanthine survival from the past, to the schoolchild who learns it from his mate the belief is a novelty; it is something just learnt, and often excitingly full of possibility for his immediate welfare.

[…] but a few people, like Steffens, found him attractive not simply because he was rich and useful but also because he was an object of study, a coelacanthine oddity in the natural history of commerce.