362 



HITCHCOCK'S ANATOMY 



Fig. 334. Fig. 335. 



Electrical Apparatus of Torpedo, b, Nervous System of an Articulate. 



Branchiae, c, Brain. e, Electric Organ. 



g, Cartilage of Cranium, me, Spinal Cord, n, Nerves to the Pectoral Fins, nl, Lat- 

 eral Nerves to the Body, np, Large Nerves (Pncumogastric) to the Electric Organ. 

 0, Eye. 



plausible that they may be regarded as Voltaic piles, or a 

 reservoir of electric power which the fish can discharge at 

 will. And it is necessary for the generation of this electrical 

 discharge that the integrity of the nervous system be main- 

 tained. 



667. Nervous System in Articulata. — In the Crusta- 

 ceans the nervous system consists of ganglia and cords. The 

 central ganglion may be regarded as a brain, which sends off 

 nerves of vision, audition, feeling, and- smelling. A splanch- 

 nic or sympathetic nerve is also found, as in the Arachnoidea 

 and Annelida. The two latter classes have ganglia, which 



667. State the general plan of the nervous system in articulates. 



