Section 90. the Pre-Maxillae and Maxillae Bound the Sides of the

nasal passage, and it is completed above by a pair of splints, the nasals. Along the floor of the nasal passage, on the middle line, lies a splint of bone formed by the coalescence of two halves. It embraces in a V-like groove the mesethmoid (nasal septum) above, and lies on the palate.

{Lines from First Edition only.} -Its position is indicated by a heavy black line in 4, and it is called, the vomer bone (vo.).-

{Lines from Second Edition only.} [In the frog it is represented by two laterally situated bones. This is the vomer bone (vo.).]

The nasal passages are partially blocked by foliated bony outgrowths, from the inner aspect of their walls, which in life are covered with mucous membrane, and increase the surface sensitive to smell. The ethmoid ends in the ethmo-turbinal (e.t.); the nasal, the naso-turbinal (n.t.); and the maxilla, the maxillo-turbinal (m.t.). In the anterior corner of the orbit there is a bone, the lachrymal (lc. Figure 1), which is hidden by the maxilla in the side view of the skull.