1895.] LOEITJS FLAYOPALLIATUS AXD PSITTACUS ERITHACUS. 393 



ventrally. This is the surface which articulates with part of the 

 zygomatic process of the quadrate as before described \ 



From beneath the hinder end of the internal angular process a 

 strong ridge runs backwards, downwards, and outwards to the 

 angular process (ag). The apex of this process is bent more 

 inwards in P. erithacus and is relatively shorter. It is longer and 

 its dorsal surface presents more of a concavity in L. jlavopalliatus. 



Preaxial aspect of mandible of Lorius Jlavopalliatus. 



a. Articular promineuce. 

 Off. Angular process. 

 c. Coronoid process. 



pa. Postarticular process. 

 }/p. Prearticular process. 



Fig. 19. 



Preaxial aspect of mandible of Psiitaous erithaem. 

 (Lettering the same as in fig. 18.) 



The mandible viewed in front shows the antero-dorsal margin 

 in L. jlavopalliatus in the form of an inverted pointed arch, an 

 angular process extending much ventrad, and an apparently very 

 slender transverse bony bar at the symphysis. In P. enthacus 

 this bar is much stouter, the angular process less extended ventrad, 

 and the antero-dorsal margin resembles an elliptical arch inverted ; 

 the defect of ossification in each ramus is also conspicuous. 



^ See above, p. 374. 



