legs

[Neo]

i was watching this animal planet special on snakes and it said that i forgot which but either boas or pythons have internal legs (skeletal structure) left over from evolution or something. Thought it was pretty neat.

[k2mag360]

this explains all about it
http://www.synapses.co.uk/evolve/lec3i.html

[chas*e]

Most Boids have had vestigial limbs from the early-mid Cretaceous period(200 -100 million years ago when earlier before that they started to loose their working limbs. They then started to take on the"snake" appearance as they do now. If you watch a boa while trying to mate, the 2 "claws" spurs move about in a circular pattern, it is quite interesting movement which might show that these had a greater use somewhere in the distant past.