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Re: polarity of bipedality in dinosaurs

From: "Jonathan R. Wagner" <znc14@ttacs1.ttu.edu>

 > >...The presence of the extra digits hampers the airfoil and, as you
 > >note below, adds unnecessary weight to the wing.
 >         Excess digits don't seem to hamper bats,

Except that bats don't really have any "excess" fingers - they are
all used as *part* *of* *the* *wing*. In the protobirds only one finger
was involved in the wing, the others *were* excess as far as flight
was concerned.

swf@elsegundoca.ncr.com         sarima@ix.netcom.com

The peace of God be with you.