The "Gryf" is found Pal-ul-don somewhere in Burrough's Africa:
http://www.erbzine.com/mag1/0107.html
Good old Tarzan had not one, but TWO places where he romped with
dinosaurs,
Pal-ul-don and Pellucidar, a world at the earth's core. This is in line
with
Burrough's penchant for making things scarier by adding extra pairs of
legs
and arms, as Dave Krentz is dealing with now.
If I remember correctly from the comics, Tarz would hitch a ride behind
the
frill of a gryf by wacking it's rostrum with a stick and calling out,
"Hoo-EEE!" Hey, I bought it when I was 10.
DV