382 



DB. ST. GEORGE MITAUT ON THE SKELETON OF 



[May 



In front of the eustachian foramen and just abo\e it begins 

 the rostrum of the basis cranii, which gets sharper as it advances 

 forwards to its junction with the palatines. On each side of its 

 hinder part is a marked fossa which runs backwards to beneath 

 the lateral eustachian process, while three small foramina open 

 into it. lu P. erithacus these two fossae are much less marked. 



Fig. 8. 



par 



Preaxial aspect of skull oi Lorius flavopalliatus. 



The anterioe aspect of the cranium is mainly hidden bv the 

 prosopium. The frontal region is visible above it, the lachrymal 

 beside it, more externally the lower part of the hinder wall of the 

 orbit and the postorbital process {po). 



Beneath the prosopium the palatines descend and diverge for a 

 space about equal to that which exists between the spot where 

 either one of them begins to be hidden by the prosopium and the 

 nearest point of the margin of the nares. 



External to the palatines, the pterygoids are seen diverging, at 

 a much more open angle, to the quadrate, while from the external 

 process of each quadrate the zygoma is seen ascending to the side 

 of the prosopium. 



Medianly and inferiorly the basi-temporal shield is visible 

 between the diverging palatines. 



In P. erithacus the frontal region seems to rise above the pro- 

 sopium for a space about equal to that between the posterior margin 

 of the prosopium (thus seen) and the anterior margin of the bony 

 nostrils, while the breadth of each of the latter is about equalled bv 

 that of the broadest part of the lachrymal. The palatines diverge 

 at an angle of about 25°, and the pterygoids at one of about 97°. 

 The paroccipital processes are visible just within each quadrate. 



In L. JJavopalUatiis the frontal is rather less visible, but the 



