This image has been taken from scan 000245 from "Report of an expedition down the Zuni and Colorado Rivers by Captain L. Sitgreaves ... Illustrations. (Report on ... Natural History ... by S. W. Woodhouse. Zool More
Public domain scan - Reptile, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description
Public domain reproduction of art print, free to use, no copyright restrictions image - Picryl description