PLATE V. 



Inoceramus tenqilineatus (page 34). 



Figure 1. Side view of a small but nearh' perfect cast of the interior of 

 this shell, from the South Saskatchewan, shoAving the shape 

 and surface uudulations i if the left valve. 

 " III. The same as seen from above, to show the thickness through 

 the closed valves. 



YoLDiA sciTULA (j^age 38). 



Figure 2. A right valve, slightly enlarged, with a portion of the outer sur- 

 face still more highly magnified represented below- The 

 cross-lines also below but a little to the right, indicate the 

 actual size of the specimen. 



Ctprin.v (iccidentalis, Var. alta (page -in). 



Figure 3. Side view of a perfect left valve. 



Protocardia suBQiTADRATA (page 41). 



Figure 4. Side view of one of the most perfect specimens collected, show- 

 ing the right valve- 

 " -lo. Outline of the same as seen from above- 



