ROYAL SOCIETY OF CANADA 



Figure 1. — Amyzon ireviiiinne; specimen from Horseiîy river, B.C., 

 natural size. 



Figure 3. — The same specimen reproduced from a photograph; twice 



the natural size. 

 Figure 3. — Amyzon commune; largest specimen from Horsefly river, 



reproduced from a photograph ; natural size. The depth 



of the trunk, owing to compression, is exaggerated in the 



fossil 



