PLATE 63. 



( Supplementary. ) 



Figs. 1-5. Orthis ID0NEU8 52 



1. Dorsal view of a small and somewhat distorted individual. 



2 - 5. Ventral, dorsal, profile and cardinal views of a large and characteristic individual. 



Figs. 6-13. Spiripera maia 416 



6, 7. Dorsal and ventral views of a young specimen. 



8-11. Dorsal, ventral, profile and front views of an elongate specimen. 



12. Dorsal view of a broadly oval form, where the cardinal line is short and gradually rounded. 



13. Dorsal view of a partially exfoliated specimen, showing a large area. 



Fig. 14. Spikifera disjuncta 243 



14. Cast of a ventral valve, 'showing the impressions of the dental lamoliss reaching to the 



front of the valve. 



Figs. 15-18. Meristella rostrata. .' 307 



15 - 18. Dorsal, ventral, profile and front views of the specimen described. 



Figs. 19-22. Meristella lenta 420 



19-22. Dorsal, ventral, profile and front views of a specimen of the ordinary size and form. 



Figs. 23-25 Rhynchospira subglobosa 421 



28, 24. Dorsal and ventral views of the cast of a specimen of medium size. 



25. Dorsal view of the cast of a larger specimen which has been slightly distorted by pressure. 



'Figs. 26-29. LEiORarNCHus multioosta • 358 



26 - 29. Dorsal, ventral, profile and front views of a cast of this species, from Richmondville, 

 Schoharie Co., N. Y. 



Figs. 30 - 32. Strophodonta plioata. . . . i. 114 



30 - 32. Dorsal, profile and ventral views of the specimen described. 



Figs. 33-36. Trematospira (?) nobilis 412 



38. Dorsal view of a crushed and distorted specimen retaining both valves, and showing the 

 surface marking in a very perfect manner. 



84. View of a dorsal valve, showing the beak and part of the crura. 



85. Fragment of another dorsal valve, showing the impression of the crura and their attachment 



to the hinge-plate. 



86. Interior of a ventral valve, showing the teeth and the elevated plate bearing the muscular 



impressions. 



