124 



CHARLES BROOKOVEK 



13 



NASAL CAPSULE 



14 



Y\^. 12 Flat reconstruction from sagittal sections of a 24 mm. -long Lcpidos- 

 teus, 11 (lays from fertilization, seen from the medial side. Dots show the dis- 

 tribution and approximate number of cells of nervus terminalis. X 40. 



Fig. 13 Flat reconstruction from transverse sections of a 43 mm. -long Lepidos- 

 teus, seen from ventral side, showing the asymmetric central ganglia of the nervus 

 terminalis on the ventral side of the olfactory nerve. Diagram adjacent to show 

 on smaller scale the positions of central and peripheral ganglia (see fig. 14) with 

 reference to the brain and nasal capsules at this age. X 27. 



Fig. 14 Flat reconstruction of the nasal capsules of the fish used for figure 13, 

 seen from the ventral side. Dots show the relative number and jjosition of the 

 cells of the peripheral ganglion on one side, the other being defective in I lie 

 preparation. X 27. 



