A few nice extinct animals images I found:
Image by BioDivLibrary
The wild beasts of the world. v.1.
London :T. C. & E. C. Jack,[1909?]
New population of Brown Spider Monkey discovered! news.nationalgeographic.com/news/2012/01/120127-new-extin... We love this red-faced spider monkey in #bhlib biodiversitylibrary.org/page/19058574
Image by andyoakley
Apparently these are extinct in the wild.