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H. W. NORRIS AND SALLY P. HUGHES 



the ear capsule, where a small ganglion occurs, thence to the dor- 

 sal side of the head, where they are distributed to the skin poste- 

 rior to the area of distribution of the third division (os. V 3) 

 of the ramus oph. spf. V. Because of its distribution, this small 





Fig. 31 A horizontal section through the ganglia of the V-VII-VIII complex 

 of the right side, an especial feature being the accessory ganglia of the ramus 

 ophthalmicus superficialis trigemini (gos.V). X25. 



nerve is here tentatively designated as a fourth division of the 

 superficial ophthalmic ramus (os. V 4). 



The striking differences between Squalus and Mustelus in 

 respect to the origin, relative size, course, and distribution of 

 the rami ophthalmicus profundus and ophthalmicus superficialis 



