A few nice extinct animals images I found:
n219_w1150
Image by BioDivLibrary
Extinct monsters
London :Chapman & Hall,1896.
biodiversitylibrary.org/page/14893555
n339_w1150
Image by BioDivLibrary
Extinct monsters and creatures of other days
London :Chapman & Hall,1910.
biodiversitylibrary.org/page/13776484