. Journal of anatomy . a-palatine sinus. Fig. 11 shows a perpendicular section through the skull of an adultchimpanzee. The section has been cut well to one side through the right Anatomy and Pathology of the Maxillary Sinus 367 orbit, laying open the antrum from the outside. A large, roughly tri-angular bony prominence (a) will be seen in the middle of the cavity, whichis the antral wall of the nasal duct. A string has been passed through theduct. This specimen is shown in the open case in the Museum of theRoyal College of Surgeons, England. This bulging nasal duct may becompared with the con
. Journal of anatomy . a-palatine sinus. Fig. 11 shows a perpendicular section through the skull of an adultchimpanzee. The section has been cut well to one side through the right Anatomy and Pathology of the Maxillary Sinus 367 orbit, laying open the antrum from the outside. A large, roughly tri-angular bony prominence (a) will be seen in the middle of the cavity, whichis the antral wall of the nasal duct. A string has been passed through theduct. This specimen is shown in the open case in the Museum of theRoyal College of Surgeons, England. This bulging nasal duct may becompared with the condition in gorilla (see fig. 12). It will be noted thatthe duct is inflated in the chimpanzee, but only its antral wall bulges intothe sinus, whereas in gorilla the inflated nasal duct extends outwards tothe bony wall of the cheek, the maxillary sinus proper being pushed backto the region above the third molar and behind it (vide gorilla, infra). Gorilla (0. savagii).—Fig. 12 represents a perpendicular section through. the left orbit of an adult male Gorilla savagii. It shows very well theenormous inflation of the nasal duct described by Professor Arthur cavity looks like an anterior division of the sinus at first sight. Itopens into the nasal passage by a large upper opening which is shown inthe drawing commencing at the end of the ink line. A section throughthe middle line, also from an adult male gorilla, shows the frontal andsphenoidal sinuses much smaller in comparison than those of the chim-panzee. The walls are much thicker, and the enormous superciliary crestwhich aflfords attachment to the forward portion of the huge temporalmuscle is very solid, at the expense of the frontal cavity. The nasalpassage is, as is usual in the apes, very large. Above the incisor rootsis the bony mass which takes the place of the suprapalatine sinus ofchimpanzee. VOL. XLIV. (third SER. VOL. V.)—JULY 1910. 24 368 Professor Arthur S. Underwood Fio-. 13 shows a perpendicular secti
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
