| OCR Text |
Show 382 DR. ST. GEORGE MIVART ON THE SKELETON OF [May 7, In front of the eustachian foramen and just above 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, In P. erithacus these two fossae are much less marked. Fig. 8. par Preaxial aspect of skull of Lorius flavopalliatus. I. Lachrymal. bts. Basi-temporal shield. oc. Occipital condyle. p. Palatine. par. Paroccipital process. po. Postorbital process. pt. Pterygoid. q. Quadrate. sph. Sphenotic process. z. Zygoma. T H E ANTERIOR ASPECT of the cranium is mainly hidden by tbe 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 tbe 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 prosopium 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 tbe latter is about equalled by 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. flavopalliatus the frontal is rather less visible, but the |
