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ANATOMY OF 



bulbous extremity. A fissure in front, beginning between the 

 anterior pyramids, (Cut, p. 311.) divides it into two lateral halves. 

 Another, less deep, beginning between the posterior pyramids, 

 divides it posteriorly. Thus it appears two long chords, united 

 in their middle line ; for at the bottom of each fissure a layer 

 of white substance is seen, running longitudinally in the form of 

 two bands at the posterior fissure, and consisting of transverse 

 filaments at the anterior, as Gall first pointed out. Two faint 

 grooves are seen at each side, in the cervical portion; the one 

 near the posterior, the other near the anterior, fissure. Its con- 

 sistence is generally less than that of other nervous parts. It is 

 composed chiefly of white fibrous substance; but in the midst of 

 this is seen a fine layer of grey pulpy substance, very irregular in 

 shape, not solid, but, as Mr. Mayo mentions, really a capsule. 



We will now trace the several parts of the encephalon. 



B, Right side of the base of the encephalon. I, Hemisphere entire of the 

 cerebellum. The primitive^band or corpus restiforme e e of the cerebellum plunges 



