PLATE IV, 



Cliiiopistha striata. 

 Fig. 1, 2. Right and left view of specimen Page 200 



Cypricardinia cataracta. 



Fig. 3. Left view of a specimen. Page 204 



Yoldia ? valvulus. 



Fig. 4, 5. Left view of two specimens. Page 223 



Cliiiopistha subnasuta. 

 Fig. 6-8, 12. Left, cardinal, right and posterior view of specimen. Page 199 



Cliiiopistha antiqua. 

 Fig. 9-11. Right, cardinal and left view of specimen. Page 200 



Cypricardinia cylindrica. 



Fig. 13-15. Left, cardinal and right view of specimen. Page 205 



Grammysia gibbosa. 



Fig. 16, 19, 20. Cardinal, left and posterior view of specimen. Page 208 



Fig. 17. Right view of a specimen. 



Fig. 18. Right view of a smaller specimen. 



Goniophora truncata. 



Fig. 21-23. Posterior, side and cardinal view of a specimen. Page 214 



Limoptera cancellata. 



Fig. 24. View of a young individual. Page 198 



