AND PHYSIOLOGY. 361 

 FiG. 333. 



4 & Xl*** 



Brains of Fishes. A, Olfactive Lobes or Ganglia. B, Cerebral Hemispheres. C Op. 



1 M ?" o v^f ^' 01faCt ° iy NerVe ' °^ °I ,tic Nerve ' Patheticua. 

 mo, Motor Oculi. aft, Abducens. Trifacial. /«, Facial, au, Auditory. Va- 

 gus. «, Tubercles or Ganglia of the Trifacial, to, Tubercles of the Vagus. 



made up of a large number of short, six-sided prisms, and 

 are abundantly supplied with nerves. And as these organs 

 are made up of prisms, which stand end upon end, and not 

 side by side only, as they appear in the cut, the idea seems 



