PLATE 17 



Probolaeum ? canadense nov. 



Page 105 



I, 2 Opposite sides of the same specimen both showing the infolded 

 anterior margin of the plate 

 S^ Albait beds. Cape Rosier Cove 



Tropidocyclus rotalinea (Hall) 



Page 229 



5 Side view showing the lobation and spiral surface lines, x 3 



4 Edge view showing the slit band, x 3 



5 Side view of an imperfect specimen, x 3 



6 Fragment enlarged to show sculpture, x 5 

 Gaspd sandstone. Gaspe Basin 



Tropidocyclus brevilineatus (Conrad) (Hall) 



Page 229 



7 Apertural view of an internal cast showing the degree of lobation. x 3 

 8-1 1 Dorsal views with whorl sections, x 3 



12 Side view showing the character of the surface, x 3 



13 An example with somewhat coarser sculpture lines, x 3 



14 Enlargement of sculpture, x 10 



15, 16 Dorsal views showing the lines crossing the slit band and also the 

 interrupted revolving lines, x 3 

 Gaspd sandstone. Gaspe Basin 



Bellerophon (Plectonotus ?) gaspensis nov. 



Page 154 



17, 18 Dorsal and side views, x i^ 



Grande Greve limestone ; division 2. Grande Greve 



Euphemus ? quebecensis nov. 



Page 229 



19, 20 Apertural views showing the absence of a slit band, x 2 and x 3 

 21, 22 Side views, showing the spiral sculpture and close umbilicus, x 3 

 and X 2 



Gaspe sandstone. Gaspe Basin 



286 



