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Show 394 DR. ST. GEORGE MIVART ON THE SKELETON OF Dimensions of the Skull. [May 7, Lorius. Psittacus. Length of prosopium from its apex to the middle of the joint which unites it with the cranium (measured along its dorsal curvature) The same measured iu a straight line Length of cranium from cranio-facial joint to the mid dorsal margin of the foramen magnum (measured along its dorsal curvature) The same measured in a straight line Length from apex of prosopium to middle of hinder margin of bony palate From middle of one maxillo-palatine junction to hinder end of lateral margin of prosopium of the same side Breadth of palate at line of maxillo-palatine junctions Breadth of cranio-facial hinge-joint on dorsum of skull Length from apex of prosopium to its lateral notch (measured along the curve) The same measured in a straight line Length from lateral notch to hinder end of lateral margin of prosopium Its greatest height of bony beak From its ventral margin to nearest margin of nasal opening vertically above it Height of its dorsum above the dorsal margin of the nasal aperture Antero-posterior extent of nasal aperture Measurement at right angles to the above Least interval between adjacent margins of nasal apertures From posterior end of lateral margin of prosopium to its lachrymal process Greatest height of frontal above lachrymal process... Height of jugal at its junction with maxilla Length of zygoma Length of pterygoid Greatest axial diameter of orbit From dorsal margin of orbit to ventral margin of zygoma taken at right angles to cranial axis From apex of frontal nasal process to distal end of lachrymal From apex of lachymal to apex of sphenotic process. From apex of lachrymal to that of postorbital process From apex of postorbital process to that of sphenotic process , From apex of sphenotic process to postaxial margin of the meatus auditorius externus , From dorsum of quadrato-jugal articulation to apex of suprameatal process From dorsum of quadrato-j ugal articulation to the greatest prominence beneath it of the ventral articular surface of quadrate 29 25 51 36 1-4 40 34 6-0 4-2 *7 1-0 1-2 •8 •7 1*2 11 •7 •05 •55 •48 1 10 •14 15 23 13 1*5 1*7 1-9 •25 •8 •75 1-1 •55 •7 14 1*7 1-2 10 1*4 1*4 •9 •05 •6 •6 •5 1-2 •2 •35 31 17 1*7 1-9 17 •8 1-2 •8 1-3 •7 |
