Platyceras gaspense nov. 



Page 22-j 



15 Side view, natural size 



Gaspe sandstone. Gaspe Basin 



Platyceras guesnini nov. 



Page 147 



17, 18 Side and ventral views 



19 Side of a largely exfoliated specimen 

 Grande Grlve limestone. Perce Rock 



Platyceras (Orthonyc.hia) belli nov. 



Page 147 



20 Small silica replacement, x 2 



21 A larger compressed example 



Grande G r eve limestone ; division 2. Grande Grfeve 



Platyceras tortuosum Hall 



Page 146 



2 2 Enlargement of sculpture 



23-25 Two specimens of average size 



Grande Grtve limestone. Perce Rock 



281 



