This image:
http://info.lib.uh.edu/sca/digital/beast/pages.html?id=91
from Edward Topsell's "The History of Four-Footed Beasts And Serpents" is the inspiration for the AD&D Lamia. It's not ancient Greek, but early 17th century.
The same book contains AD&D's scaly bull-like Gorgon.
Fabulous book. The Su Monster is in there too.