PLATE 46 



Rhipidomella melvillei n. sp. 

 Page 185. 



Figs. 1-10. Ventral, dorsal, posterior, anterior, and side views of two specimens. 



Figs. 11-13. Ventral, dorsal, and anterior views. 



Figs. 14, 15. Ventral and dorsal views. 



Fig. 16. Ventral view. 



Fig. 17. An incomplete ventral valve. 



Bilobites varied (Conrad) 

 Page 185. 



Figs. 18-20. Ventral, dorsal, and anterior views. 

 Figs. 21-23. Ventral, dorsal, and posterior views. 

 Fig. 24. Ventral view. 

 Fig. 25. Dorsal view. 



Leptaena rhomboidalis (Wilckens) 

 Page 186. 



Fig. 26. A partially exfoliated, incomplete ventral valve. 

 Fig. 27. Interior of an incomplete dorsal valve. 

 Fig. 28. A partially exfoliated, incomplete ventral valve. 

 Fig. 29. Internal cast of an incomplete ventral valve. 

 Fig. 30. External cast of a part of a dorsal valve- 

 Fig. 31. Dorsal view. 

 Fig. 32. Ventral view. 



Stropheodonta arata (Hall) 

 Page 187. 



Fig. 33. Almost complete external cast of an incomplete dorsal valve. 



Figs. 34, 35. Ventral and side views of a partially exfoliated, incomplete ventral valve. 



Stropheodonta (Leptostropkia) plannlata (Hall) ' 

 Page 187. 



Fig. 36. An incomplete ventral valve. 



Fig. 37. Interior of a portion of a ventral valve. 



Fig. 38. A partially exfoliated, incomplete ventral valve. 



