Image presents the longer version and has done a wonderful presentation of it.
Without explaining what happened to the pilots, D'Arcy and the gals sail a raft to a deserted island and take refuge. They manage to find a cabin there, but are greeted by a dead professor trapped in a giant spider web. Being hot and bothered by one of the nymphs, D'Arcy goes for a midnight stroll, only to be bitten by a spider that looks like it was stolen from Jim Henson's muppet factory. He soon turns into a hairy, fanged monstrosity and terrorizes the women. By this point, D'Arcy's monster has been sidelined so that we can ogle at the half naked gals skinny dipping and squirming around like cats in heat, but he reappears to claim more victims and procure a moody, well-photographed ending.