OCR Text |
Show 186 ON THE SUPRAORBITAL CANAL OF CHIMYERA. [Mar. 5, angle with the branch B of the previous division. Just before the union of the branches D and B of the profundus, the branch B is joined by a twig from the Ramus ophthalmicus superficialis VII, which rises from the maiu superficialis trunk just after its entry into the preorbital cartilage, and runs forward embedded in the cartilage to a point close in front of branch B ; upon leaving the cartilage at this point it turns abruptly upwards to make the above-mentioned junction with branch B of the profundus. .Part of Ophthalmicus superficialis VII and profundus V of Chimcera monstrosa. A, B, C, D, branches of the profundus ; II, 711, optic and oculo-motor nerves ; /', outline of the forehead ; i.r., internal rectus; opth.s. VII, ophthalmicus superficialis V I I ; prof. V, ophthalmicus profundus V ; s.o.c, supraorbital canal. The nerve, consisting now of fibres derived from both superficialis aud profundus, continues its antero-dorsal course for a short distance, and is then joined by a second twig from the superficialis. This twig rises from the main trunk directly before its entry into the preorbital cartilage ; it runs in an antero-dorsal direction buried for a short space in the skull; it emerges close behind branch C of the profundus and passes beneath that nerve without being in any way connected with it, to reinforce the compouud superficialis and profundus nerve as previously stated. The compound nerve now soon divides into three branches : one of these I lost, after a short course, upon the perichondrium; each of the other two |