492 
MB. W. K. PABKEB ON THE SKULL OE LEPIDOSTEUS OSSEUS. 
pt.o. 
Postorbital 
s.op. 
px. 
Premaxillary. 
sp.o. 
py. 
Pituitary body and space. 
s.t. 
2- 
Quadrate. 
su.ob. 
q.c. 
Quadrate condyle. 
sy. 
s.ag. 
Supra-angular. 
t.cr. 
s.d. 
Sucking disk. 
tr. 
spl. 
Splenial. 
V. 
s.ob. 
Supraorbital. 
vb. 
s.ob.c 
and s.ob. Supraorbital cartilage. 
Subopercular. 
Sphenotic. 
Supratemporal. 
Suborbital. 
Symplectic. 
Tegmen cranii. 
Trabecula. 
Y omer. 
Vestibule. 
