PLATE 39 



Leptostrophia tardifi nov 



. . Page 195 



I, 2 Exterior of ventral valves 

 3, 4 Surface, x 5 



Grande Greve limestone. Perce Rock 



Leptostrophia irene (Billings) 



{See plate 38) 

 Page 193 



5 Enlargement of surface, x 3 

 6, 7 Exterior of ventral valves 



8 Internal cast of a small ventral valve 

 Grande Greve limestone. Grande Greve 



Leptostrophia magnifica Hall 



{See plate 38) 

 Pages III, 190 



9 Enlargement of sculpture ; from plate 38, figure 2. x 5 

 10 Exterior of a ventral valve 



St Alban beds. Cape Rosier Cove 



330 



