PLATE III. 



Fig. 



Cy there frigonula, p. 25. 



a. Perfect, right valve upwards 



b. Perfect, dorsal view 



c. Perfect, anterior view 



d. Right valve, dorsal view 



e. Right valve, inside 

 /. Left valve, inside 



g. Left valve, dorsal view 



h. Portion of surface of valve 



25 



X 



25 



X 



25 



X 



25 



X 



25 



. X 



25 



. X 



25 



X 



150 



Crag. 



2. Cythere Woodiana (old individuals), p. 29. 



a. Left valve, outside 



b. Right valve, outside 



c. Perfect, dorsal view 



d. Perfect, anterior view 

 'e. Left valve, hinge-line 

 /. Right valve 



g. Portion of surface of valve . 





X 



25 





X 



25 





X 



25 





. X 



25 





. X 



25 





X 

 X 



25 

 150 



Crag. 



3. Cythere laqueata, p. 30 



a. Right valve, outside 



b. Perfect, dorsal view 



c. Perfect, anterior view 



d. Left valve, dorsal view 



e. Left valve, hinge-line 



f. Right valve, hinge-line 



g. Right valve, dorsal view 



h. Portion of surface of valve 



4. Cytherideis Tamarindus, p. 49. 



a. Perfect, left valve upwards 



[The faint reticulate punctation is not shown in the figure.] 



b. Perfect, dorsal aspect 



X 25 





X 25 





X 25 





. X 25 





X 25 



Crag 



X 25 





. X 25 





. X150 





. X 25 ^ 



^ Crae- 



. X 25 



/ '^i<>S 



5. Cythere lacunosa, p. 31. 



a. Right valve, outside 



b. Perfect, ventral aspect 



6. Cythere sphcendolineata, p. 36. 



Right valve, outside 



7. Cythere retifastigata, p. 36. 



Left valve, outside (old individual) 



X 25 

 X 25 



Crag. 



X 25 Crag. 

 X 25 Crag. 



