LATERAL CANAL SYSTEM OF SELACHIANS 



63 



(S 





Lat.Cn. 





^■^ f- ^ '^ §4 - 



* 69 '# 



S.Crh. Pt.O. Dt.En. Dot.O. Ac.O. 



Lat. Cn. 



Epti 



-Def. 



70 



Lat.Cn. 



I. Orb 



Mnc/.Pt.O. 



Figs. 69, 70 Transverse sections of the lateral canal at different levels show- 

 ing a great difference in the size of the lumen. Squalus, 52 mm. X 560. 



Figs. 71, 72 Lateral and ventral views of a 67 mm. specimen. Squalus. 

 X U. 



