The Collaborative International Dictionary of English v.0.48:

Paleontological \Pa`le*on`to*log"ic*al\
   (p[=a]`l[-e]*[o^]n`t[-o]*l[o^]j"[i^]*kal), a.
   Of or pertaining to paleontology. --
   Pa`le*on`to*log"ic*al*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

paleontological
    adj 1: of or relating to paleontology [syn: paleontological,
           palaeontological]