This is a Duck's Skull
a, premaxillary bone;
b, partly ossified internasal septum;
b', pervious part of nostril;
c, end of premaxillary, perforated form numerous branches of second division of the fifth cranial nerve;
d, dentary bone of under mandible;
e, groove of nerves, etc.;
f, a vacuity between dentary and other pieces of the mandible;
g, articular surface;
h, recurved "angle of the jaw;"
i, occipital protuberance;
j, vacuity in supraoccipital bone;
k, muscular impression on back of skull;
l is over the black ear-cavity;
m, post-frontal process;
n, quadrate bone;
o, pterygoid;
p, palatine;
q, quadrato-jugal;
r, jugal;
s, maxillary;
t, fronto-parietal dome of the brain-cavity; u;
u, the lacrymal bone, immense in a duck, nearly completing rim of the orbit by approaching m; v, vomer;
w, supra-orbital depression for the nasal gland;
x, cranio-facial hinge;
y, optic foramen;
z, etc. interorbital vacuities.