Martian Alice has three articulated vertebrates.

Fig. 1 below shows three articulated vertebrates below the skull and a
vessel protruding from the eye socket of Alice on Mars.
Fig. 1:
http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1555343376&p=101

Fig. 2: Another view of Alice showing more vessels protruding from the
skull:
http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1555161103&p=45

Source of Fig. 1:
http://www.flickr.com/photos/hortonheardawho/2856976774/