PYROTHERIUM 169 
Fig. 109. Palatal views of the basicranial region of A. Pyrotherium, and B. Palaeomastodon, for comparisons; alc., alisphe- 
noidal canal; als., alisphenoid bone; Bsp., basisphenoid bone; ew., Eustachian canal; f./.m., foramen lacerum medium; f.l.p., 
foramen lacerum posterior; f.o., foramen ovale; 7.c.c., foramen for the internal common carotid; mx., maxilla; oc.f., occipital 
foramen; pal., palatine bone; ~.p.f., post-palatal foramen; pf., pterygoid bone; pt.s., and p.ty.sqg., post-tympanic process of 
the squamosum; sqg., squamosum; st.m.f., stylomastoid foramen. 
