Re: Ex ungue leonem

Many thanks to James H. Dee for elucidating this reference.

'Ex ungue leonem' may not have become a motto, but it was bandied around as
a catchphrase in the early 19th century when Cuvier identified a fossil
found in a gypsum mine in Montmartre as an early opossum simply by looking
at its jawbone, then scraped away the gypsum to reveal two pelvic bones
peculiar to marsupials to prove his assertion.

RH