. Cunningham's Text-book de l'anatomie. L'anatomie. Processus Uncinate Fig. 149.-l'article montrant l'aspect de la gauche nasale labyrinthe de l'ethmoïde. Crista galli avec l'os lacrymal ; tout en bas, par son union avec la surface de l'orbite du maxillaire, le sinus de l'air dans les deux situations sont terminés. En arrière la lamina papyracea articule avec le sphenoid, et à sa face postérieure de l'angle inférieur d'une distance variable avec le processus orbital du palais, l'os qui servent à fermer dans les cellules. L'aspect médial du labyrinthe ethmoidal affiche le conchse alambiquée de la n

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. Cunningham's Text-book of anatomy. Anatomy. Uncinate process Fig. 149.—Section showing the Nasal Aspect of the Left Labyrinth of the Ethmoid. Crista galli with the lacrimal bone; whilst below, by its union with the orbital surface of the maxilla, the air-sinuses in both situations are completed. Posteriorly the lamina papyracea articulates with the sphenoid, and at its posterior inferior angle for a variable distance with the orbital process of the palate bone, both of which serve to close in the air-cells. The medial aspect of the ethmoidal labyrinth displays the convoluted conchse of the nose, usually two in number, though occasion- ally there may be three—rarely more. In cases where there are two ethmo-turbinals 1 they are separated posteriorly by a deep groove. A channel is thus formed in the back part of the lateral and upper aspect of the nasal fossae, called the superior meatus, which is roofed in by the concha nasalis superior (superior concha), whilst its floor is formed by the superior surface of the concha nasalis media (middle concha). The posterior ethmoidal cells open into this meatus. In front of the superior meatus, which only grooves the posterior half of this aspect of the bone, the surface is rounded from above downwards and before backwards, and forms the medial wall of the anterior and middle ethmoidal cells. Running obliquely from above downwards and backwards over the medial surface of the superior concha, are a number of fine grooves continuous above with the foramina in the cribriform plate; these are fewer and more scattered in front, do not pass on to the middle concha, and are for the olfactory nerves. The middle concha is nearly twice the length of the superior. Its anterior extremity is united for a short distance to the ethmoidal crest on the medial side of the frontal process of the maxilla. By its thickened, free convoluted border it overhangs a deep groove which runs along the inferior surface of the ethmoidal labyrinth. This

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