PLATE XVI. 



Productella (Strophalosia ?) TRUNOATA (page 112). 



Figure 1. Specimen of this species, shewing the exterior of the ventral valve. 



Figure 2. Similar view of another specimen. 



Both figures are twice the natural size. The outlines on the side 

 of each figure are intended to show the contour of the closed 

 valves and the exact dimensions of each specimen. 



Turbo Shumardi (page 116). 



Figiire ?>. Dorsal view of a specimen of this species, from the Township of 

 Bosanquet. 



Plattceras (Orthontchia) coNrcOTi (page 117). 

 Figure 4. Lateral view of a specimen of this species, from Thedford. 



Platyceras quinquesincatum (page 117). 

 Figure 5. Apertural view of a specimen from Thetford. 



Plattostoma i'Lioatum (page IIS). 

 Figure <j. Dorsal view of the type of this species. 



