This weird film makes no attempt at reality at any level. Whereas its predecessor "The Land that Time Forgot" established its own surreal reality and worked at that, this spin-off barely tries. Not one but three lost tribes, with not a moment given to viability. The dinosaurs are ridiculous. There were no sailing films in the Royal Navy in that period (c.1920). Why couldn't they have had a flashback showing the Susan Penhaligon character having her pretty head cut off? Yet in all the mess, someone was trying. The enormous eunuch High Priest and his dwarfish acolyte could have been grafted in from another film that never got made. All in all, a total waste of time.
I enjoyed watching this - and remember watching the first film THE LAND THAT TIME FORGOT in 1974 at the cinema.
All enjoyable hokum - ridiculous, yes, but it's not a documentary! If you want social realism, might I suggest you look elsewhere.
The dinosaurs are fine for their time (1970s) - a time before CGI which allowed Jurassic Park to be made just over 15 years later. But I enjoy puppets and stop-motion monsters, so that's fine with me.
This reminds me of those old Flash Gordon films - it's very old-fashioned but it works, because it's set around 1920.
Great fun solong as you can suspend your disbelief. But remember, this ain't Jurassic Park!