LATERAL CANAL SYSTEM OF SELACHIANS 



31 





Fig. 19 Longitudinal section of the sensory column and zone of nerve dis- 

 tribution. Mustelus adult. Silver pyridine tech. X 444. 



Fig. 20 Longitudinal section of the sensory column showing very long and 

 delicate fibrillations. Mustelus adult. Silver-pyridine tech. X 592. 



Fig. 21 Longitudinal section of lateral sensory column showing wide dis- 

 tribution of fibrillae. Non-meduUated fibers are to be seen in the fiber zone. 

 Mustelus adult. Silver-pyridine tech. X 440. 



Fig. 22 Section of lateral sensory epithelium cut at right angles to long axis 

 of the secondary sensory cells. Cell boundaries could not be seen. Mustelus 

 adult. Silver-pyridine tech. X 440. 



