770 MR. D. M. S. WATSON ON 
A small part of the ethmoid remains in contact with the under 
surface of the frontals, and is a small bone with a very small cavity 
for the olfactory lobes of the brain. 
The interparietal (I. Par., text-fig. 17) is a very large vertically 
placed plate on the back of the skull. Its anterior face is in con- 
tact with the upper part of the supraoccipital and the posterior 
ends of the parietals. Laterally it overlaps the parietal rami of 
the postorbital and squamosal and the tabulare. 
Text-figure 17. 
Titanosuchus. Dorsal aspect of skull. Premaxille from type. 
The remainder from R. 3595 B.M.N.H. x2. 
P.O., Postorbital; Sq., Squamosal; I.Par., Interparietal; Tas., Tabulare. 
The tabulare (Tas., text-figs. 17 & 18 B) is a large bone, 
whose medial border is covered by the interparietal and whose 
