I'lalc I*). 



Fig. 1. Meliceritites sarthacensis d'Orb. Distally is seen a lieterozooecium wliicli has been regenerated 

 and proximally one provided with a calcareous mandible. X 34. 



— 2. The same species. There is seen two heterozooecia, one of them with a calcareous mandible. 



X 34. 



— 3. Meliceritites magnifica d'Orb. Of the six zooecia the four have been regenerated, and the aper- 



tures of the new zooecia have been closed by a concave lamina. (Not well executed). > 34. 



— 4. The same species. Four of the zooecia and three of the heterozooecia have been regenerated 



and some of them twice. The aperture of the new zooecium at the rigth side has been 

 closed by a concave lamina. X 34. 



— 5. The same species with ooecium. X 20. 



— 6. The same species with another form of ooecium. X 20. 



— 6a. The same species. Two of the zooecia are provided with an operculum, and two are closed by 



a lamina presenting a ±-shaped opening. X 34. 



— 7. The same species. There is seen two different forms of closure. X 34. 



— 8. The same species. Different forms of closure from the same colony. X 47. 



— 9. The same species. A regenerated zooecium with operculum. X 47. 



— 10. The same species. A transverse section through a heterozooecium to show the lateral jjrocesses 



covering the larger part of the aperture. X 47. 



— II. Meliceritites gothica nov. nom. Three zooecia with opercula and one regenerated which has been 



replaced by a heterozooecium. X 34. 



— 12. The same species. There is seen three kenozooecia, three zooecia with o|)ercula, tliree closed 



heterozooecia and three zooecia, all of which have been regenerated by means of hetero- 

 zooecia. >' 20. 



— 13. A zooecium of the same species. X 34. 



— 14. The same species. The aperture is closed by a flat lajnina which has arisen from the free 



edge of the oral ledge. X 34. 



— 15. Meliceritites Vieilbanci d'Orb. Five of the zooecia have been regenerated X 34. 



— 16. The same species. There are seen four zooecia with opercula, two regenerated, two open and 



two closed by a concave lamina. X 34. 



— 17. Meliceritites trifolium n. sp. Five zooecia with opercula. X 47. 



— 18. The same species. There are seen six heterozooecia, and two zooecia regenerated bj' means of 



heterozooecia. X 47. 



— 19. The same species. There is seen a heterozooecium. and three zooecia regenerated by means of 



heterozooecia. (In one of them the two lateral processes have been broken off.) X 47. 



*) The present is the las! plate lithograplied by the e\celkiit artist Mr. C Cokdts, but (lie execution l)iars wit- 

 ness to that he has not been able to lay the last hand on it before his death. 



