PLATE III. 



All the figures are magnified 25 diameters, except 2 c, d h, and 15 c, X 75. 

 Fig. 



1. Cypridea spinigera (Sowerby). (Page 14.) 



a. Left valve of a young individual ; h, ventral aspect of a perfect carapace 

 from the Weald Clay of Punfield, Dorset. 



2. Aglaia ? ci/pridoides, Jones & Sherborn. (Page 12.) 



a. Right valve ; b, edge view ; c, muscle spot, magnified. 



3. Bairdia ovoidea, Jones & Sherborn. (Page 18.) 



a, Left valve ; h, muscle spot magnified. 



4. Gythere consobrina, Jones. (Page 20.) 



a, Left valve ; b, dorsal aspect of carapace. 



5. Gythere Beidii, Jones & Sherborn. (Page 23.) 



a, Left valve ; b, ventral aspect. 



6. Gythere retifastigiata, Jones. Var. cequior, Jones & Sherborn. (Page 23.) 



a, Left valve ; b, ventral aspect. 



7. Gythere lachrymalis, Jones & Sherborn. (Page 26.) 



a. Left valve ; b, ventral aspect. 



8. Gythere dlctyosigma, Jones. (Page 24.) 



a, Right valve ; b, ventral aspect of carapace. 



9. Gythere trachypora, Jones. (Page 24.) 



a. Left valve; b, ventral aspect. 



10. Gythere Gharlesivorthiana, Jones & Sherborn. Right valve (damaged). (Page 



21.) 



11. O^i/iere 6«t'Crtirt., Jones & Sherborn. (Page 26.) 



a. Right valve ; b, left valve ; c, dorsal aspect of carapace ; d, ventral 

 aspect of carapace. (The same individual.) 



12. Gythere riUosa, (x. 0. Sars. (Page 25.) See also Plate I, figs. 4 a, b. 



a, Left valve ; b, ventral aspect of carapace ; c, hinder portion of a left 

 valve of another individual. 



13. Gythere Icesa, Jones & Sherborn. (Page 25.) 



a. Left valve ; b, ventral aspect. 



14. Gythere Woodwardiana, Jones & Sherborn. (Page 23.) 



a, Left valve ; b, ventral aspect. 



15. Gythere angulafopora (Reuss). (Page 22.) 



a. Left valve ; b, ventral aspect ; c, left valve, portion magnified. 



16. Gythere delirata, Jones & Sherborn. (Page 28.) 



a, Right valve ; b, ventral aspect of carapace. 



17. Gythere Bosquetiana, Jones & Sherborn. (Page 22.) 



a, Left valve ; b, ventral aspect. 



18. Gythere Forbesii, Jones & Sherborn. (Page 31.) 



a, Left valve ; b, carapace open to show interior and ligament. 



19. Gythereis cornigata (Reuss). Var., Jones & Sherborn. (Page 32.) 



a, Right valve ; b, ventral aspect. 



20. 21, 22. Gytheridea elongata, Brady. (Page 38.) 



a. Right valve; b, dorsal aspect of carapace; 21. Left valve; 22. Right 

 valve. 



23. Xestoleberis aurantia (Baird). Var., Jones & Sherborn. (Page 42.) 



a, Carapace showing the right valve ; b, dorsal aspect of carapace. 



24. Gytherura dathrata, G. 0. Sars. (Page 44.) 



a. Left valve ; b, dorsal aspect of carapace. 



25. Gytherella, sp. (Page 48.) 



a, Right valve ; b, edge view. 



