CAMBRO-SILURIAN FOSSILS OF MANITOBA. 



Trans. R. S. C, i88q. 



Sec. IV. Plate XVI. 



'j-HEWr-O/V/. ^ 

 K^ SOCIETY 1 



L. M. LAMBE, DEL. 



Trochoceras McCharlesi. — (l) Side view of llie type of the species, slightly reduced in size ; (2) Outline of transverse section of same to show 



the asymmetr)' of the volutions. 



