Plate XVI 
(Natural size) 
Kanastephanus mackenzii n. sp. (Page 23.) 
Figure 1, Ventral view of holotype. National Museum of Canada, Cat. No. 9017. 
Figure 2. Side view, same specimen. 
Figure 3. Ventral view, same specimen, to show lappets. 
Kanastephanus altus n. sp. (Page 24.) 
Figure 4. Side view of holotype. National Museum of Canada, Cat. No. 9018. 
I'igure 5. Ventral view penultimate whorl of same specimen. 
Figure 6. Oblique view penultimate whorl of same specimen, showing suture line. 
Kanastephanus crickmayi McLearn. (Page 22.) 
Figure 7. Ventral view of holotype. National Museum of Canada, Cat. No. 9016. 
Figure 8. Side view', same specimen. 
