The 9th/10th Doctor's Desktop TARDIS setting should be URCHIN not coral!

Could this

(Histocidaridae from the NHM Echinoid Database)

be this? 

(from wikipedia-TARDIS)

And this...

(this is Aristotle's Lantern-the jaw in sea urchins)

Looks like this!

Thus, I can only conclude! 


Are the TARDIS roundels (the little pentagonal/round patterns) spine bosses?