PLATE VII. 



PAGE 



Fig. 1. INOCERAMUS? RECTANGULUS. 47 



View of right valve. 



1 a. Section of same, to show its convexity. 



Fig. 2. INOCERAMUS? OBLIQUUS. 47 



View of right valve. 



2 a. Section of same, to show its convexity. 



Fig. 3. An undetermined bivalve. 



Fig. 4. LIMA? SINUATA. 43 



View of a left valve, with the front of the beak broken away. 

 4 a. Anterior profile view of the same, to show its convexity, and 

 gaping margin. 



Fig. 5. LIMA ? RECTICOSTATA. 44 



View of right valve. 



Fig. 6. LIMA? CUNEATA. 44 



View of right valve, with beak and portions of the 

 margin broken away. 



Fig. 7. MYTILUS MULTISTRIATUS. 49 



View of right valve. 

 7 a. Magnified surface striae of same. 



