996 IR. D. M. 8. WATSON ON 
The pterygoid articulates by a pendunculate facet with the 
basipterygoid process ; behind this the posterior ramus runs back 
to the quadrate. It is shown in the specimen as a very narrow 
strip, but in front there are appearances which suggest that the 
part visible is really only a narrow rib on the lower surface of a 
much broader bone, as in Captorhinus. In front the pterygoid is 
not very clearly distinguishable from the palatine and ecto- 
pterygoid. It bears three raised ridges, each covered with a 
granulation of very small, closely-set teeth ; the posterior ridge is 
Text-figure 1. 
Broomia perplexa. Restoration of palate. 2. 
B.Sp., Basisphenoid ; Jw., Jugal; Mer., Maxilla; Pal., Palatine; Par.Sp., Para- 
sphenoid ; Pr.Jfv., Premaxilla; Pr.V., Prevomer; Pé., Pierygoid; Qu., 
Quadrate; Qu.Ju., Quadratojugal ; Tr, Transverse. 
short, directed nearly laterally, and has only a single series of 
teeth; the second ridge is rather longer, directed forward, and 
bears two irregular rows of denticles; the third ridge forms the 
inner margin ef the bone and runs forward as far as the specimen 
allows it to be seen; this ridge is covered with a large number of 
irregular rows of teeth, so that it forms a closely-set granular 
area. ‘The surface of the bone between the dentigerous ridges is 
depressed and between the two anterior ridges has a few smail 
scattered teeth. There is a distinct process applied to the inner 
