So apparently he really wasn't sure what it was after all. He'd heard Mediterranean before and it was the closest fit he could find, but it seems far too large to be a Mediterranean, since it is between 7" and 8".

He says it basically looks like this, but without the white bumps/spots.

Now I'm that much more cautious about taking it from him, because I'd rather know what it is so that I can take care of it before I take it!