skin fossils

["Colette H. Adams" <cadams@hh.gpz.org>]

Dear all,

        I have never seen an illustration of the fossilized skin of Carnotaurus
sastrei.  My understanding is that it contains small tubercle-like scales
with larger scales or plates in a more less regular pattern.  Is any of the
skin of the head preserved?  How large are the scales?  
        Also, I have heard that there is a skin fossil fragment from 
Tyrannosaurus
rex.  Is there any scalation, and if so, how large are the scales?

                                                        Best regards,

                                                        Dave