186 



ON THE SUPEAOEBITjiL CANAL OP CB.1MJEBA. [Mar. 5, 



angle Avith the branch B of the previous division. Just before 

 the uaion of the branches D and B of the profundus, the branch 

 B is joined by a twig from the Eamus ophthahnicus superficialis 

 VII, which rises from the main 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. 



Text-fig. 49. 



-Part of Ophthalmicus superficiahs VII and profundus V of 



Chimara moustrosa. 



A, B, C, D, branches of the profundus ; II, III, optic and oculo-uiotor nerves ; 

 /', outline of the forehead; i.r., internal rectus; 02}th.ii. YIl, ophthalmicus 

 supei'ficialis VII ; jprof.y, ophthaluiicus profundus V ; s.o.c, supraorbital 

 canal. 



The nerve, consisting now of fibres derived from both superficialis 

 and profttndus, continues its autero-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 Avilh it, to reinforce the compound 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 



