DESCRIPTION OF THE PLATES. 



PLATE I. 



Fig. 1. Stenocyathus vermiformis Pourt., profile of calicle, mag. 7 times (see also Plate III. 

 figs. 11 and 12). 



" 2. The same from above. 



« 3. Lophohelia prolifera M.-Edw. & H., nat. size. 



" 4. The same, calicle in profile, showing bud, mag. 3 times. 



" 5. The same from above. 



" G. Lophohelia exigua Pourt., nat. size. 



" 7. The same, calicle from above, mag. 5 times. 



" 8. Dendrophyllia cyathoides Pourt., nat. size. 



" 9. The same, calicle from above, mag. about 3 times. 



" 10. Thecopsammia tintinnabulum Pourt., nat. size. 



" 11. The same, calicle from above. 



" 12. Coelosmilia fecunda Pourt., nat. size. 



" 13. Parasmilia variegata Pourt., nat. size. 



" 14. Caryophyllia cornuformis Pourt., mag. 4 times. 



" 15. The same, calicle from above. 



" 16. Caryophyllia formosa Pourt., nat. size. 



" 1 7. Desmophyllum Cailleti Duch. & Mich., nat. size. 



" 18. The same, calicle from above, mag. twice. 



PLATE II. 



Fi". 1. Deltocyathus Agassizii Pourt., from above, mag. twice. 



" 2. The same, in profile. 



" 3. The same, from below. 



" 4. The same, variety, from below (see also Plate V., figs. 9 and 10). 

 " 5. The same specimen, from above. 



" 6. Diaseris pusilla Pourt., from above, mag. twice. 

 " 7. The same, septa in profile, mag. 4 times. 



" 8. The same, specimen of fig. 6, from below. 



" 9. Thecopsammia socialis Pourt., mag. l£ times. 

 " 10. The same, calicle from above. 

 " 11. Haplophyllia paradoxa Pourt., nat. size. 

 " 12. The same, calicle from above. 

 " 13. The same, vertical section. 



" 14. Thecocyathus eylindraceus Pourt., mag. 3 times. 

 " 15. The same, from above. 

 " 1G. Stylaster complanatus Pourt., nat. size. 

 " 17. The same, calicle from above, mag. 50 limes. 

 " 18. Cryptohelia Peireii Pourt., nat. size. 

 " 19. The same, two ealiclcs, mag. 4 times. 



