. The Journal of laryngology and otology. etween the sphenoidal sinus and the oculo-motortwice; between the sphenoidal sinus and the trochlearis, twice ;between the sphenoidal sinus and the first division of the trigeminus,ten times ; between the sphenoidal sinus and the second division ofthe trigeminus, seven times; between the spenoidal sinus and theabducens, eight times. The relationship was homolateral in allsave one in which it was contra-lateral. These refer to twelvespecimens in which, as a rule, several nerve-trunks showed homo-lateral and only once several nerve-trunks showed contra-l
. The Journal of laryngology and otology. etween the sphenoidal sinus and the oculo-motortwice; between the sphenoidal sinus and the trochlearis, twice ;between the sphenoidal sinus and the first division of the trigeminus,ten times ; between the sphenoidal sinus and the second division ofthe trigeminus, seven times; between the spenoidal sinus and theabducens, eight times. The relationship was homolateral in allsave one in which it was contra-lateral. These refer to twelvespecimens in which, as a rule, several nerve-trunks showed homo-lateral and only once several nerve-trunks showed contra-lateralrelations. Among eleven bone specimens I found intimate relationsbetween the sphenoidal sinus and the superior orbital fissure three Jnly, 1914.] Rhinology, and Otology. 363 tiines; between tlie posterior ethmoidal cells and the supeiiororbital fissure, twice; between the sphenoidal sinus and the foramenrotundum, three times; between the posterior ethmoidal cells andthe foramen rotundum, twice; between the sphenoidal sinus and C. C. p. J. o. Fig. 9.—Natural size. Eelationship of the frontal simis to the superiororbital fissure and to the optic foramen, Frontal sinus, ethmoidal cell. o. Orbita. /. o. Optic foramen. /. o. s. Superiororbital fissure. the foramen ovale, once; between the frontal sinus and the superiororbital fissure, once; between the sphenoidal sinus and the Vidiancanal, once. These refer to six specimens. Fig. 10 illustrates the relationship of the sphenoidal sinus to theVidian canal, in which the Vidian nerve runs, standing in connectionwith the two ganglions of the trigeminus, the spheno-palatine 364 The Journal of Laryngology, [July, 1914. ganglion and the otic ganglion. The thin superior protruding wallof the Vidian canal running in the floor of the sphenoidal sinus isremoved and the position and course of the Vidian canal in theinferior wall of the sphenoidal sinus is well shown. Thus a bony wall which is thin to the point
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