old ref

["John R. Hutchinson" <jrhutch@socrates.berkeley.edu>]

Not a new ref by any means, but air sac lovers will want to check this out
if they haven't yet:

King, A.S.  1957.  The aerated bones of _Gallus domesticus_.  Acta
anatomica 31:220-230.

Six specimens of Rhode Island Reds show a LOT of variability in extent of
air sacs diverticular invasion of vertebrae.  Yikes!  Someone needs to look
at this in more specimens, more ontogenetic stages, and more taxa.

                        John R. Hutchinson
                 Department of Integrative Biology
                  3060 Valley Life Sciences Bldg.
                University of California - Berkeley
                     Berkeley, CA 94720 - 3140
                      Phone:  (510) 643-2109
                      Fax:    (510) 642-1822
         http://ucmp1.berkeley.edu/people/jrh/homepage.html