Plate III.— The Cranial Nerves of the Skate. (Adftat.) 



Olfacto 



Ophthalr 

 Superfi 

 Ophth£ 

 Profi 



Palatine 



Spiracle, 

 t End of / 



lies V. and y 11/ 



Optic Lobes. ' 

 Cerebe! 



Neural Ridge._ 



Lateral Ridge.. 



.f/% 



Lateral Line. 

 Visceral. 



On the right the eye is seen ifi situ with its muscles : the skin has been removed, 

 exposing the mandibular muscle, and the olfactory capsule has been opened to show 

 the olfactory lobe. The hyo-mandibular has been dissected out with its branches ; 

 further back the jugular sinus has been cut open showing the glossopharyngeal and 

 vagus. In the centre the roof of the cranium has been removed to expose the brain. 

 On the left, the eye has been cut away showing the deeper nerves on the floor of 

 the orbit. 



The V. or trigeminal nerve is red, the vii. or facial is blue. The x. or vagus is 

 also coloured red. 



