Atlas and axis of Diplodocus, from side, Samuel Wendell Williston, 1925
Illustration of atlas and axis of diplodocus (from side) from the osteology of the reptiles (1925). Date: 1925. The Osteology of the Reptiles p104
Author: Samuel Wendell Williston (1851–1918)Source: https://commons.wikimedia.org/Loading...