Reptilan Inhabitant of Nameless City

The higly advanced race dwelling in the great city of Arabia. They seemingly went extinct around the time human race appeared. But..
"That is not dead which can eternal lie,
And with strange aeons even death may die."

"They were of the reptile kind, with body lines suggesting sometimes the crocodile, sometimes the seal, but more often nothing of which either the naturalist or the palaeontologist ever heard. In size they approximated a small man, and their fore-legs bore delicate and evident feet curiously like human hands and fingers. But strangest of all were their heads, which presented a contour violating all know biological principles. To nothing can such things be well compared - in one flash I thought of comparisons as varied as the cat, the bullfrog, the mythic Satyr, and the human being. Not Jove himself had had so colossal and protuberant a forehead, yet the horns and the noselessness and the alligator-like jaw placed things outside all established categories."
H.P. Lovecraft, The Nameless City