Tafl. IV. 



Pig- 



Fig. 16, 17. Avicula Münster! 200. 



— 18. Modiola Ravni 202. 



— 19. Myoconcha borealis 203. 



— 20. Leda lacryma • 204. 



- 21 a, b, c. Astarte Wandeli 204. 



— 22. Astarte Bayi 204. 



— 23. Astarte amygdaloides . 206. 



— 24. Astarte Hartzi . 205. 



— 25. Cardium concinnum 207. 



— 26 a, b. Tancredia elongata 206. 



— 27. Cyprina cf. Cancriniana 207. 



