. L'odorat, le goût, et des sens chez les vertébrés . Sens et de sensation ; vertébrés. Anatomie de l'organe olfactif 25 la paroi latérale de chaque chambre dans sa cavité nasale et en partie que diviser en trois cavités environ hori- zontal passages : le méat inférieur sous l'infériorité de la Concha, le méat moyen sous le milieu concha et le méat supérieur supérieur en vertu de la Concha. (Fig. 2). La narine externe conduit à la fois à la première chambre du nez, le vestibule, qui relie presque directement avec le méat inférieur, moins directement avec le su- méat supérieures et à t

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. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. ANATOMY OF THE OLFACTORY ORGAN 25 the lateral wall of each nasal chamber into its cavity and partly divide that cavity into three approximately hori- zontal passages: the inferior meatus under the inferior concha, the middle meatus under the middle concha and the superior meatus under the superior concha. (Fig. 2). The external naris leads at once to the first chamber of the nose, the vestibule, which connects almost directly with the inferior meatus, less directly with the su- perior meatus and through the so-called atrium with the middle meatus. Between the median sep- tum of the nose and the laterally situated conchae is a considerable space known as the common meatus. Dorsally this space is continuous with a narrow slit lying between the superior concha and the septum and called the olfactory cleft. All these pas- sages and spaces communicate more or less directly and freely through the posterior naris or choana with the pharynx. In the bones about the nose in man are large paired air- spaces or sinuses that communicate with the exterior through the nasal cavity. These spaces, which have been very fully described by Schaeffer (1916), are of consid- erable size and are lined with a mucous epithelium con- tinuous with that of the nose. They are somewhat variable in number and connections and yet they fall more or less. Fig. 2.—Diagram of a trans- verse section of the right nasal cavity in man made at the plane indicated by the vertical dotted line in Fig. 1. 1, inferior concha; 2, middle concha: 3, superior con- cha; 4, nasal septum; 5, inferior meatus; 6, middle meatus; 7, superior meatus; 8, common meatus; 9, olfactory cleft (left side); 10, ethmoid cells; 11, maxillary sinus.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resem

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