THE LATERAL SENSE ORGANS OF ELASMOBRANOHS. 



487 



and on entering the capsule, where one is present, each division again divides to 

 send a small nerve-twig to each ampulla. 



(l) Superficial Ophthalmic. 



The main portion of this nerve proceeds to the ophthalmic group of ampullae 

 (text-figs. 6 and 8), giving off slender branches to the supra-orbital (sensory) canal 



Text-fig. 8. — Dorsal dissection of nerve-supply of ampullae, R. circularis, natural size. 

 O. Gills. Other lettering as in text-fig. 6. 



on its way, and continuing as a slender branch beyond the ampullae to the tip of 

 the snout for the further supply of the sensory canal. 



(2) Inner Buccal. 



The inner buccal branch of the buccal nerve, after its division from the outer 

 buccal, passes under the nasal capsule and sends two branches to the inner buccal 



