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Show 384 DR. ST. GEORGE MIVART ON THE SKELETON OF [May 7, the lachrymal process, is a foramen-the outer precranial foramen e0pC)-separated by a ridge from the fossa before described * as bounded postaxially by the crucial ridge, and beneath it the crucial ridge (cr) is plainly to be seen passing outwards from the cranial septum to the adjacent surface of the lachrymal. At the bottom of this fossa is (ipc) the inner precranial foramen. External to the distal end of the lachrymal on either side is the postorbital process (po), beneath which is the notch interposed between it and the sphenotic process (sph). Passing inwards from the postorbital process to the vicinity of the optic foramen (opf), the transverse ridge before noticed1 (tr) is to be seen. Finally between the paroccipital processes is the basi-temporal shield (bts), beneath the middle of which is the prominence of the occipital condyles (oc). Fig. 10. Anterior aspect (prosopium being removed) of Lorius fiavopalliatus. (Lettering the same as in fig. 9.) In Lorius flavopalliatus, thus seen, the transverse groove is shorter, the lachrymal is notably longer, and the paroccipital processes are narrower, less blunt and rounded distally, and more inclined mesiad; the basi-temporal shield is also relatively as well as actually narrower from side to side. T H E POSTERIOR ASPECT of the cranium presents, in P. erithacus, a dorsal margin which is very convex on either side but slightly concave in its middle. Laterally its outline is mainly straight and vertical with certain projections : these are, above, the postorbital margin ending in the postorbital process, beneath which is a small sharply marked concavity limited below by the projection of the suprameatal process. Just below this, again, is another concavity (as sharp as, though shorter than, tbe preceding one) which 1 See above, p. 376. |
