PLATE VII. 



Phragmoceras Nestor, Hall. Var Canadense, (page 39). 



Figure 1. Specimen from Durham, with part of the septate end preserved. 

 " la. Cast of the chamber of habitation, from Hespeler. 

 ♦' 16. Aperture of the last specimen, as seen from above. 



Pheagmoceras partum, Hall & Whitfield, (page 41). 

 Figure 2. Cast of the chamber of habitation, from Hespeler. 



EuRTPTERus Botlei (page 42). 

 Figure 3. Natural mould of the exterior of the species, from Flora. 



Anodontopsis concinna (page 12). 



Figure 4. Right valve of the ordinary form of the species. 

 " 4a. Eight valve of an unusually short and broad variety, from 

 Gait. 



MuRCHisoNiA TROPiDOPHORA (page 29). 



Figure 5. Side view of the only specimen known to the writer. 

 " 5a. Another view of the same, to show the aperture. 



StTBULITES OOMPACTUS (pagO 15). 



Figure 6. Side view of a specimen from Durham, about twice the natural 

 size. 



Operculum of Gasteropod (page 33). 

 Figure 7. Side view of operculum No. 2. 



