PLATE 38 



Leptostrophia magnifica Hall 



(See plate 39) 

 Page 190 



1 Dorsal view of an average specimen with crenulated cardinal angles and 



the surface bearing Spirorbis and Crania 



2 Ventral valve of a well preserved specimen 

 Grande Grlve Limestone ; division i. Grande Greve 



Leptostrophia irene (Billings) 



{See plate 39) 

 Page 193 



3 Internal cast of a large ventral valve, showing the character of the 



muscle scar and the denticles on the hinge line 



Grande Greve limestone ; division i. Grande Greve 



328 



