Irrational Games "From The Vault", March Edition

The official Irrational Games website has been updated with another "From the Vault" feature, with this latest edition spotlighting five creatures that might have inhabited Rapture if BioShock's early production plans would have stayed the course. Concept art is included, but the text might be enough:
Monster Bug

This is one of the more gruesome pieces of concept work to emerge during work on BioShock a huge insect slowly growing from within a human being and taking over the physical form. And as sickening as this image is, its true power comes from what's implied: what was it like for the original person transitioning to this state of organic fusion? And what mash-up of man and bug is hidden under that cloth?