THE INTERNAL SURFACE OF THE PALATE BONE

(AFTER SAPPEY.) 4, the ephenoidal proce ; 6, the pterygoid proce ; 8, the inferior’ tnrbinated sphenoidal proce ; 9, the groove 0l Tidge; 11, the posterior nasal spine, the posterior palatine canal. the confluence of the palate b. and the superior maxilla, [L, Lie Palato-pterygoid b. In comparative anatomy, a b. formed by the confluence of the palate and pterygoid b's, [L, 202.]—Parasphenoid b., Par asp he noil dal b. long, splint-like membrane b. situated at the base of the skull in certain of the lower vertebrates. In most fishes and Amphibia it forms the greater portion of the base of the skull, and appears to replace functionally the bas i sphenoid and the pre sphenoid b’s, In higher vertebrates it is often confounded with the bas i: (is 12, 200.—Parethmold b. See Ethmo-turbinal » Lat., 08 parietale. Fr., os par iétal, Ger., Scheitelbein, Seiten wand be in. A quadrilateral b. having an internal concave and an external convex surface. It forms the larger portion of the lateral surface of the skull,