PLATE XVIII. 



Nautilus Liardensis (page 137). 



Figure 1. Side view of the type of this species. 

 Figure 1 ((. Front view of the same specimen. 



PoPANOcERAs McCoNNELLi (page 138.) 



Figure 2. Side view of a specimen of the typical form. 



Figure 2a. Front view of tlie same specimen, in outline. 



Figure '2J). Portion of the sutural line of anotlier specimen. 



Figure 3. Side view of a specimen of the vanety lenlicularc. 



Figure oa. Front view of the same, in outline. 



Tracittoeras Canadense (page 142). 



Figure 4. Side view of the type of this species. 



Figuie4((. Fi'ont view of the same, sliowing tlie groove in the centre of tlie 



al)dominal region. 

 Figure 46. I'ortion of tlie sutural line of the Hame S[)ecimoii. 



