the maxilla sends in a plate to form the front part of the hard palate.
Behind, the hard palate is completed by the pair of palatine bones
(pal.), which conceal much of the pre- and orbito-sphenoid in the
ventral view, and which run back as ridges to terminate in two small
angular bones, the pterygoids (pt.) which we shall find represent much
more important structures in the lower vertebrata.