Alien: The design of the Facehugger's sculpted underbelly

leading from

Creating the Alien Facehugger

and

HR Giger's Passage Temple Entrance

a facehugger prop made for use in the movie

sculpted facehugger's underbelly
  based on Giger's artwork. If you turn it 
upside down you may notice better it's 
similarities with the design below

Ridleygram showing the facehugger's underbelly 
based on Giger's artwork

Source of facehugger underbelly pattern used 
by Ridley Scott from Giger's Temple Passage 
entrance, which seems to be a strange distorted 
a biomechanisation Humpty Dumpty Face on 
a baby's toy

Giger's Temple Passage entrance work 262 (1973)
from the book Giger's Necronomicon partially inspired by
the 1973 version of the Fisher Price Activity Center

The 1973 version of the Fisher Price Activity Center