Okay, I admit it...this little film holds a special place in my heart. It is the absolute first movie I can ever remember watching on television. I remember watching it on a Saturday morning after cartoons, and looking at the TV Guide to see that it was actually classified as a "melodrama". All I really remember from that initial viewing was the fight between the two lizards and the attack by the giant spider.
I recently managed to obtain a copy of the movie and finally re-watched it after what was probably thirty years. First of all, I never knew it was based on a Jules Verne novel, who is one of my favorite authors of all time. Too bad it was based on one of the few Verne books I haven't read.
Cesare Danova is great as the French duelist who is picked up with an American who had affronted him in a disagreement over a woman. What follows turns into your standard caveman/regular-lizards-pretending-to- be-dinosaurs type film. The two end up becoming the leaders of opposing prehistoric tribes and things continue from there.
The movie is nothing really that great, but it's a fun little movie that's on a par with any 1950's programmer.