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Show 370 DR. ST. GEORGE MIVART ON THE SKELETON OF [May 7, Above this is an oblique groove (og) running preaxiad and^ventrad to below the lateral concave surface before noticed. From the inferior margin of the postaxial surface of the prosopium four processes depend. Two of these (tap) m a y be called median processes, and each is long and sharply pointed and projects Fig. 4. Posterior aspect of prosopium of Psittacus erithacus. dp. Dorsal process. lp. Lachrymal process. mp. Median processes. mr. Median ridge. og. Oblique groove. plf. Fossa for reception of palatine. pn. Posterior prosopial nares. sp. Lateral processes. Fig. 5. Posterior aspect of prosopium of Lorius flavopalliatus. lp. Lachrymal process. mp. Median processes. mr. Median ridge. og. Oblique groove. p. Dorsal process. plf. Fossa for reception of palatine. pn. Posterior prosopial nares. sp. Lateral processes. ventrad on each side of the median ascending ridge. The other two, lateral or side processes (sp), are much shorter and depend one from each of the two oblique grooves (og) before described. The two inner margins of the two posterior prosopial nares are formed by the lateral margins of the median osseous |