PLATE XXII. 



NTTCTJLA LEVATIFORME 241 



Fig. 1. Eight valve. 



la. Outline. Natural size. 



SCHIZODUS PlNTflENSIS 253 



Figs. 2, 2 a. Eight and left valves. Natural size. 



SCHIZODUS CURTIFORME 253 



Fig. 3. Eight valve. Natural size. 



3 a. Profile view of fig. 3. 



CARDIOLA f FILICOSTATA 251 



Fig. 4. Left valve, enlarged to two diameters. 



4 o. Anterior view of fig. 4. 



SCHIZODUS DEPARCUS 252 



Fig. 5. Eight valve. Natural size. 



5 a. Posterior profile view of fig. 5. 



SOLENOMYA CURTA 242 



Fig. 6. Left valve. Natural size. 



11. A more transverse right valve. Natural size. 



MYALINA NEMESIS 237 



Fig. 7. A right valve. Natural size. See plate xix, fig. 5. 



MYALINA NESSUS 238 



Fig. 8. A large right valve. 



8 a. A smaller right valve, showing the anterior margin. 



EDMONDIA f CIRCULARIS , 246 



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



MYALINA CONGENERIS 237 



Fig. 10. Eight value. Natural size. See plate xix, fig. 6. 



