The Air That I Breathe.......??

[Neila]

I once read that it was once discussed for A3 but it was discarded in order to give the Dog Alien a more elegant look.

giger once said that the tubes always bothered him a bit.
edit:
shit, sorry.
simultaneous posting.

[SiL]

Giger said the tubes were basically to stop the Alien looking like a giant T.

On all fours, this wasn't an issue, so he ditched them immediately.