Joseph Leidy

American anatomist and paleontologist (1823 – 1891).

Born September 9th, 1823 in Philadelphia.

Died April 30th, 1891 at 67 years old in Philadelphia.

Occupations
anatomist, botanical collector, botanist, paleontologist, parasitologist, scientific collector, university teacher, zoologist
Wikipedia

As a well spent day brings happy sleep, so life well used brings happy death. Leonardo da Vinci