l'liilf VII, 



Fig. I. Meliceritites palpebrosa nov. nom. Two zooccia with a convex closuiv-plate >. 'M. 



— 2. The same species. A zooccium with a flat closure-plate. 34. 



— 3. The same species. Four zooecia with opercula. X 34. 



— 4. The same species. A zooecium with a beginning convex closure plate. X 34. 



— 5. The same species Five zooecia with a convex closure-plate. The proximal part of the closure 



has in three of the zooecia been directed obliquely inwards. X 34. 



— G. A zooecium with a distal convex and a proximal concave closure-plate. X 34. 



— 7. Three zooecia with a beginning distal and a well-developed proximal closure-plate. The proximal 



margin and a portion of the lateral margins of the aperture are still seen. X 34. 



— 8. A zooecium with a convex closure-plate. X 34. 



— 9. Two zooecia in which both the distal and the proximal part of the closure are well-developed. 



X 34. 



— 10. Meliceritites durobrivensis Greg. A transverse section through a branch. Chatham. X 34. 



— 11. A portion of the atrial ring in the ooecium of Crista eburnea. Denmark. >; 175 



— 12. The distal part of the ooecium of Crisia eburnea after the removal of the frontal wall. The 



atrial ring is seen. X 66. 



— 13. An opened ooecium of Mel. mngni/ica after the adzooecial wall has been dissolved. The zooids 



covered by the ooecium are in this case completely developed. X 20. 



— 14 An opened ooecium of Mel. maijnifica after the adzooecial wall has been dissolved. The zooids 



covered by the ooecium have no calcified frontal wall. >., 20. 



— 15 An opened ooecium of Mel. luagnifica. X 20. 



— 1Ö. A fragment of Mel. magnifica showing three different superficial layers. X 1- 



17. An opened ooecium of Mel. magni/ica, which belongs to the growing end of a superficial layer 

 and the distal half of which covers an elder portion of the colony. Tlie adzooecial wall 

 has been dissolved. X 20. 



— 18. An open ooecium of Mel. magnifica in the proximal part of wliich is seen a zooecium and 



three heterozooecia besides the aperture of the gonozooecium. It is likelj' to suppose that 

 the former have originally been cowered by a bulging part of the adzooecial wall, which 

 has later been destroyed. X 20. 



— 19. Mel. magni/ica. A transverse section of a branch with an ooecium. >; 14. 



— 20. An open ooecium of Mel. lamellosa d'Orb. The adzooecial wall together with a part of the 



underlying zooeeial tubes have been dissolved. X 20. 



— 21. An opened ooecium of Mel. lamellosa. Ihe proximal half of the atrial ring is seen. X 20. 



— 22. Mel. lamellosa. The distal end of an opened ooecium with the proximal half of the atrial ring. 



X 34. 



— 23. Mel. lamellosa. A transverse section of a colony. >; 2Ü. 



— 24. Spiropora miciopora d'Orb. A transverse section. X 20. 



— 25. Entalophora Roemeri n. sp. A transverse section. X l*- 



— 26. Zooecia of Ent. Roemeri. >; 20. 



— 27. An opened ooecium of Mel. angulosa d Orb. , 20. 



— 28. Mel. angulosa d'Orb. The distal end of an opened ooecium with the proximal half of the 



atrial ring. >; 00 



— 29. The distal part of an opened ooecium of Mel. angulosa d'Orb. seen from the proximal end. 



The whole atrial ring is seen. ,■ 34. 



— 30. Mel. pgrenaica d'Orb. A transverse section. X H. 



