Spinfer gaspensis Billings 



29, 30 Internal casts of dorsal and ventral valves 



31,32 Exterior of dorsal and ventral valves with characteristic lamellose 

 surface. (32 x 2) 



33 A slightl)' distorted ventral valve 



34 Enlargement of a portion of the surface to show fimbriae, x 5 



35 Internal cast of dorsal valve 



36 Internal cast of ventral vah^e 



2,"] A characteristic exterior of the ventral valve, x 2 



38 Enlargement of surface of dorsal valve, x 4 



Gaspd sandstone. Gaspe Basin 



315 



