Dolichorhynchops osborni. Plesiosaur: left mandible to symphysis; Captorhinus agtiti. Cotylosaur: left mandible, Samuel Wendell Williston, 1925
Illustration of dolichorhynchops osborni mandible and captorhinus agtiti mandible from the osteology of the reptiles (1925). Date: 1925. The Osteology of the Reptiles p39 Fig-25