PLATE V. 



Page. 

 MEGAMBONIA OCCIDUALIS 173 



Fig. 1. Left valve. Natural size. 



ACTINOPTERIA BOYDI 166 



Fig. '2. Left valve. Natural size. 



LlMOPTERA 8ARMENTICIA ll>7 



Fig. 3. Small left valve. Natural size. 

 3 a. Side view of 36. 

 3 fe. Large left valve. Natural bize. 



SANGUINOLITES ? SAKDUSK YENSIS 176 



Fig. 4. Left valve. Natural size. 



MlCRODOX (C.) MACROSTRIATU6 180 



Fig. 5. Eight valve. Natural size. 



PTERINEA FLABELLA 165 



Fig. 6. Left valve. Natural size. See plate xv, fig. 12. 



MODIOMORPHA OBLOXGA 170 



Fig. 7. Left valve. Natural size. 



SCHIZODU8 (C. ) ORBICUhARIS 181 



Fig. 8. Cast of right valve. Natural size. 



8 a. Small right valve with a more strongly-outlined postero-cardinal angle. 



MODIOMORPHA ALTIFORME 169 



Fig. 9. Cast of right valve. Natural size. 



LEIOPTERIA RAVINESQUII 166 



Fig. 10. Left valve. Natural size. 



10 a. Small left valve. Natural size. 



MYTILARCA (PLETHOMYTILUS) OVIFORMIS 169 



Fig. 11. Cast of right valve. Natural size. 



PTERINEA NEWARKENSIS 165 



Fig. 12. Cast of right valve. Natural size. 

 LEPTODESMA TRANSVERSA 167 



Fig. 13. Left valve. Natural size. 



CYPRICARDINIA INDENTA 182 



Fig. 14. Left valve. Natural size. See plate xv, fig. 11. 



