PLATE III {continued). 



Fig. 

 8. Cythereis senilis, p. 37. 



a. Right valve, outside 



b. Right valve, ventral aspect 



9 a — e. Cythere Macropora, p. 35. 

 a. Right valve, outside 

 L. Perfect, ventral aspect 



c. Perfect, dorsal aspect . . . . x 25 ) Cra£ 



d. Perfect, anterior aspect 



e. Left valve, outside (young) . 



9/ — i. Cythere Traehypora, p. 36. 



f. Left valve, dorsal aspect 



g. Left valve, inside 



h. Right valve, inside . . . x 25 ( Cra S- 



i. Left valve, dorsal aspect 



X 



25 1 



X 



25 J 



X 



25 ^ 



. X 



25 



X 



25 



X 



25 



. X 



25 ' 



X 



25 



X 



25 



X 



25 



X 



25 



Crag. 



