390 DB. ST. GE0K6E MITAET ON THE SKELETOIT OP [May 7, 



The ramus is deepest at the coronoid process (c) in both species, 

 thence it gradually narrows postaxiad in P. erithacus, but more 

 gradually still in L. flavopalliatus, the dorsal and ventral margins 

 of the ramus inclining towards each other at an angle of 

 about 16°, while in P. erithacus the angle is about 15°. The 

 dorsal margin behind the dentary process is nearly straight and 

 somewhat inflected in the last-named species, but decidedly though 

 slightly concave in L. Jlavopalliatus and not inflected, and the 

 outer surface of the ramus is scarcely convex from above down- 

 w'ards, but is rather strongly so in P. erithacKs (a little below the 

 dorsal margin at this part), and, to a less degree, from before back- 

 wards. 



Fig. 14. 



Ventral aspect of mandible of Lorius jlavopalliatus. 



a. Articular prominence. 

 ag. Angular process. 

 ia. Internal articular process. 



pa. Rudiment of a postarticular 

 process. 



The margin between the dentary and coronoid processes is 

 relatively much shorter in. L. jlavopaTliatus anA (when the man- 

 dibles rest on a horizontal surface) is more upwardly inclined post- 

 axiad. In both there is a small postcoronoid process (pc) — it may 

 be almost obsolete in P. eritJiacvs, — but the margin between it aud 

 the coronoid is relatively longer and less concave in L. Jlavo- 

 palliatus. The margin extending thence to the slightly marked 

 prearticular process (^jp) is almost straight in both, but slightly 

 more concave as well as longer in P. erithacus. Betw-een the pre- 

 articular process and the articular prominence («) the margin is 

 slightly concave in both ; very slightly more so in P. erithacus. 

 The articular prominence is about equally developed in both species, 

 but while in the last-named species there is a distinct though 

 very small postarticular process (pa), whence the postaxial margin 

 of the mandible inclines veiy steeply backwards to the angular 

 ■process, in L.JIavnjyalliatus there is no postarticular process, or but 

 a trace of it, aud the hinder margin slopes very gently to the angular 

 process {ag), forming an angle of about 40° with the posterior part 



