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CHAELES BROOKOVER 



duce two apertures. One is larger and posterior near the eye, 

 while the other is anterior and more median near the end of the 

 snout and has already begun to develop a slightly protrusible 

 nasal tube for the intaking of water. As the folds of Schneider- 

 ian membrane are smaller at the anterior end of the mucosa, it 

 appears that new folds are added at this point as the animal 

 grows. The cells from the ganglion scatter in a line beneath 



distal end 



Fig. 8. Golgi impregnation of part of the ganglion cells of the nervus termi- 

 nalis in young Amia about 25 mm. long. A few olfactory fibers are shown. The 

 latter are smaller and have slight varicosities. X 333. 



the median fold or mid-rib. The cells are easily recognizable 

 because their cytoplasm takes Delafield's hematoxylin more 

 strongly than surrounding cells. That some of the ganglion cells 

 are true nerve cells at this stage, is indicated by the fact that 

 Golgi preparations (fig. 8) show branching processes, — toward 

 the brain in this instance. 



The 50 mm. stage is instructive and important, as the cells 

 have attained practically the same distribution that they have 



