56 Bulletin of Laboratories of Dejiison University. [Voi. xii 



Stannius ('49, p. 82) has shown that mechanical stimula- 

 tion of the vagal lobe of the carp produces movements of the 

 intrinsic muscles of the palatal organ. Since the nucleus am- 

 biguus of the cyprinoids does not differ from that of other 



mot. layer 



Fig. ij. Portion of the vagal lobe from a transverse section of the brain of 

 Minytrema melanops (Raf.) 8 cm. long. GoLGi method. X 187. 



This is drawn from the same series as Fig. 10, the sections being adjacent. 

 For ease of orientation the position of the neurone marked a on Fig. 10 is desig- 

 nated a in this sketch. The large neurone at the bottom of the figure in the 

 layer of secondary gustatory tracts sends one of its two chief dendrites outward 

 into relation with the arborizations of the peripheral gustatory neurones, the other 

 is cut off. The neurite is not shown. The intrinsic neurone to the left of it is a 

 characteristic type II cell. The intrinsic neurone at the top of the figure is 

 drawn in from the adjacent section. Its neurite enters the secondary gustatory 

 tract {^s.g.t.) 



teleosts, in which it is known to innervate the branchial muscu- 

 lature, it is extremely probable that the cells of the motor layer 

 of the vagal lobe give rise to the nerve fibers for these intrinsic 

 muscles, for these two structures (the palatal organ and motor 

 layer of the vagal lobe) are always developed proportionately 

 with each other. 



