Hammer-Headed Bat Head
The head of the Hammer-Headed Bat (Hypsignathus monstrosus). Also known as the big-lipped bat, it is in the Pteropodidae family of megabats.
L. Brent Vaughan Hill's Practical Reference Library of General Knowledge (New York, NY: Dixon, Hanson & Company, 1906)
Courtesy the private collection of Roy Winkelman