PLATE XV. 



Page. 



Inoceramus Sagensis var. Vanuxemi 76 



Fig. 1. View of a left valve (rom Keyport, N. J. The specimen is quite flat with the undu- 

 latiuDS very sharpb' detiued. 



Inoceramus Sagensis Owen 76 



Fig. 2. View of an imperfect convex right valve from Keyport, N. J., with broad, rounded 

 undulations. There are spots in the position of the receding muscular scars. 



Inoceramus Barabixi Morton 75 



Fig. 3. View of an imperfect right valve, which is quite convex, from Freehold, N. J. 



4. Vit'wof a specimen from Marlborough, N. J. 



5. Cardinal view of same, showing its convexity. 



Inoceramus ? peuovalis Conrad 80 



Fig. 6. View of ihe right side of a cast, which is Mr. Conrad's type of the species. 



Gervilliopsis mini.ma Whitfield 74 



Fig. 7. Enlarged view of the right side of the cast described. 



Gervilliopsis ensiformis Conrad 73 



Fig. 8. View of the inside of an imperfect left valve, showing muscular impressions, area, 

 etc. The anterior end is slightly restortd at the thickened part. 

 9. Basal view of the anterior end of the large specimen figured on Plate X, fig. 5, show- 

 ing the anterior opening. 



10. View of a cast of a large left valve, showing the peculiar muscular scars; a, ante- 



rior t; p, posterior; c and d, jirobably pedal scar. 



11. View of the anterior end of a cast. One of those used by Mr. Conrad in the original 



description of the species. 



