1895.] LORIUS FLAAOPALLIATTIS ASD PSITTACUS EEITHACCS. 397 



Anyles of SkuU. 



L. flavo- 

 palliatus. 



Angle of divergence sides of bony beak (seen 

 dorsally) 



Angle between sides of cranium from outer end of 

 cranio-facial articulation to most prominent 

 points of postorbital prominences i 



Angle to which dorsal margin of orbit approxi-j 

 mates when seen from above ' 



Angle formed by pterygoid with postero-superior! 

 margin of palatine 



Angle formed by the line of junction of palatine 

 to cranium with the postero-superior margin ofj 

 palatine behind that junction I ]25 



Angle formed by line of junction of palatine with 



basis craniih^hmA that junction 170 



Angle formed by inferior margin of the basis cranii- 

 with the antero-inferior margin of interorbital 

 septum just in front of its junction with thei 

 palatines up to septal process | 155 



Angle of divergence of palatines when skull is viewed 

 from behind 



Angle of divergence of zygomata. : 



Angle of divergence of pterygoids 



Angle of divergence of palatines when skull is viewed 

 on its ventral surface 



Angle between the antero-superior and the antero- 

 inferior margins of palatine 



Angle between the antero-inferior and the postero- 

 inferior margin of palatine, postaxial process not 

 being taken into account 



Angle of preasiad divergence of zygoma and ptery-, 

 goid 



Angle formed by inner and postero-external surfaces 

 of quad rate 



Angle of divergence of mandibular rami 



Angle of oblique line on mandible marking limit of 

 horny beak and ventral margin of the mandible. . 



50° 



95 

 120 



15 



25 

 35 



85 



30 



90 



72 



32 



120 



Psittacus. 



40^ 



80 



140 



35 



150 

 1«0 



140 



23 

 35 

 72 



18 



25 



95 



25 



58 

 32 



120 



Distinctive Cranial Characters of L. flavopalliatus from 

 P. erithacus. 



In L. jlavopalliatvs : — 



(1) Cranium more flattened. 



(2) Prosopium more slender and elongated. 



(3) Orbit more enclosed by bone, 



(4) Palatines extend less ventrad compared with quadrates. 



(5) Occiput less rounded and more inclined preaxiad above 



lambdoidal ridge. 



