vertebrae connections

[Caleb <terminator2029@usa.net>]

   I was looking at some of the vertebrae illustrations in the Ostrum 1969
paper on Deinonychus, and found a problem. I can't figure out how the
vertebrae lock together. Do the prezygophyses click in underneath or over the
postzygophyses? Help! Is there a site that is more detailed than the
Dinosauria.com's Omnipedia anatomical section (with illustrations to, because
my brain doesn't work with three dimensional objects very well.) Thank you
all. 

                                             Many thanks,
                                             Caleb Lewis

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