Plate IX 
Terebraiula suttonensis Clapp and Shinier 
Figure 1. Pedicle valve showing at the front the three longitudinal folds with their included 
two sinuses; also the low, broad growth ridges upon the middle of the valve. X 1. (Page 86.) 
Pleuromya pearsonensis n. sp. 
Figure 2. View of the type specimen. Right valve somewhat crushed; hinge-area broken 
away. X 1. (Page 86.) 
Megalodon canadensis n. sp. 
Figure 3. View of type specimen. Right valve showing stronger and finer growth lines, 
cast of cavity beneath the posterior portion of the dental platform, and to the left of this the upward 
bending of the hinge-area of the valve, a portion of the shell here still remaining in place. X f . 
(Page 87.) 
Figure 4. Reconstruction of a valve; cross-section from posterior part of hinge-line to base; 
showing groove beneath dental platform. X 1. (Page 87.) 
Turcicula mccanni n. sp. 
Figure 5. View of type specimen. The knobs at the outer angle of the whorls are more 
conspicuous than appears in the photograph. Tip of shell wanting. X 1|. (Page 87.) 
