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Show 390 DR. ST. GEORGE MIVART ON THE SKELETON OF [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. flavopalliatus and not inflected, and the outer surface of the ramus is scarcely convex from above downwards, but is rather strongly so in P. erithacus (a little below the dorsal margin at this part), and, to a less degree, from before backwards. Fig. 14. ft Ventral aspect of mandible of Lorius flavopalliatus. 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. flavopalliatus and (when the mandibles rest on a horizontal surface) is more upwardly inclined postaxiad. In both there is a small postcoronoid process (pc)-it may be almost obsolete in P. erithacus,-but the margin between it aud the coronoid is relatively longer and less concave in L. flavo-pallicdus. The margin extending thence, to the slightly marked prearticular process (pp>) is almost straight in both, but slightly more concave as well as longer in P. erithacus. Between the prearticular 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 tbe last-named species there is a distinct though very small postarticular process (pa), whence the postaxial margin of the mandible inclines very steeply backwards to the angular process, in L. flavopalliatus there is no postarticular process, or but a trace of it, and the hinder margin slopes very gently to the angular process (ag), forming an angle of about 40° with the posterior part |