. On the anatomy of vertebrates [electronic resource] . ostrils are obliquelyapproximated. In both groups the nostrils cease to be ter-minal ; in a Bornean Douc (Semnopithecus nasicus), the nos-trils are produced upon an ill-shapen prominent subcylindricalnose. In the Gorilla each nostril is surmounted by a broadprominence, arching outward from a lower part impressed by amedian furrow ; a deeper indent divides the nasal ala from thecheek: the aspect of the nostrils is forward and a little out-ward. The septal cartilage extends to the tip of the interalarprominence. 1 xx. vol. iii. p. 100. 2 en
. On the anatomy of vertebrates [electronic resource] . ostrils are obliquelyapproximated. In both groups the nostrils cease to be ter-minal ; in a Bornean Douc (Semnopithecus nasicus), the nos-trils are produced upon an ill-shapen prominent subcylindricalnose. In the Gorilla each nostril is surmounted by a broadprominence, arching outward from a lower part impressed by amedian furrow ; a deeper indent divides the nasal ala from thecheek: the aspect of the nostrils is forward and a little out-ward. The septal cartilage extends to the tip of the interalarprominence. 1 xx. vol. iii. p. 100. 2 en, p. 18, pi. viii. fig. 6. OKGAN OF SMELL IN MAMMALIA. 217 In Man the number of olfactory nerves varies from fifteen totwenty: after traversing the cribriform plate, they divide intotwo chief sets, 6 septal and c turbinal, and ramify between theperiosteum and the pituitary membrane before terminating on thelatter. The septal nerves, fig. 158, «, are about twelve innumber, are quickly resolved into brushesof filaments, which unite together to form 159. Branches of the olfactory aud nasopalatine nerves on the Alar cartilages, human nose, septum of the nose. xciv. xciv. finer plexuses, traceable to near the base of the septum. Theposterior fourth of the septal membrane is chiefly supplied by thenasopalatine nerve, b. The turbinal or labyrinthic olfactorynerves are more numerous, rather smaller, and more plainlyanastomotic in their course over the upper and middle turbinals,lying in grooves of the former, and extended chiefly upon theinner and lower front of the midturbinal; a few combine withthat part of the nasopalatine which supplies the lower part of themiddle turbinal. The lower turbinal is almost exclusively sup-plied by a branch of the (nasopalatine. The main charac-teristic of the human organ of smell is the prominence of thefore-part of the chamber, having the nostrils on its lower surface,and constituting the feature emphatically called the ( nose, , 161. The for
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