Hey gang, somethin' a little bit different. Here's an illustration of Dian, the Beautiful--as she faces off one of the dread Mahars of Pellucidar. This is a cover for the National Capital Panthans, an Edgar Rice Burroughs fan club.
Y'know, it's been awhile since I read the Pellucidar novels, but I'm pretty sure the Mahars were supposed to be some kind of highly-evolved, ESP-enabled pterodactyls. I think you're right about the Thidpars--they were pterodactyls, but they weren't the intelligent ones.
Thanks Mike! Y'know, I'm goin' through a huge Burroughs/Howard phase right now. I just want to draw Tarzan, John Carter, Conan, Tars Tarkas, Solomon Kane, Dejah Thoris, King Kull, and so on and so on! Prolly just old age setting in and I'm gettin' all nostalgic about childhood's end...
Actually it's an old Book Club edition hardback (I imagine the Science Fiction Book Club) that has a dust cover that plugs "the spectacular American International film, AT THE EARTH'S CORE, starring Peter Cushing and Doug McClure." It doesn't say when it was printed, just copyright 1914. But I do agree that the pictures on the covers of Burrough's paperback books are often times one of the best parts.