92 DESCRIPTION OF THE PLATES. 



PLATE III. 



Fig. 1. Lcptocyathus S.impsonii Pourt., mag. 1 times. 



" 2. The same, from above. 



" 3. The same, from below. 



" 4. Caelosmilia feeunda Pourt , mag. twice. 



" 5. The same, calicle, mag. 4 times. (The specimen has a small rudiment of a columella, 



but by no means as large and distinct as represented by the artist.) 



" C. Galaxea eburnea Pourt., mag. twice. 



" 7. The same, calicle from above. 



'• 8. Ceratocyathtis prolifer Pourt., specimen showing mode of budding from calicle of 



parent, nat. size. 



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



" 10. The same, vertical section, showing dissepiments. 



" 11. Stenocyathus vermiformis Pourt., specimen with ealicles at both ends, nat. size. 



" 12. The same, calicle magnified (more common form than Plate I., fig. 2). 



" 13. The same, part of horizontal section, showing small cavities communicating with 



interseptal chambers. 



" 14. Allopora miniacea Pourt., nat. size. 



" 15. The same, branchlet, mag. about twice. 



" 1C. The same, calicle, mag. 10 times. 



" 17. Lepidopora cochleata Pourt., nat. size. 



" 18. The same, end of branchlet, mag. about 50 times. 



" 19. The same, vertical section, mag about 50 times. 



PLATE IV. 



Fig. 1. Khizotrochus fragilis Pourt., mag. twice. 



" 2. The same, calicle from above. 



" 3. The same, horizontal section, to show internal orifices of the roots. 



" 4. The same, horizontal section through the peduncle, to show the hollow roots. 



" 5. Balanophyllia floridana Pourt., mag. twice. 



" G. The same, calicle from above. 



" 7. Pliobothrus symmetricus Pourt., nat. size 



" 8. The same, end of branch, mag. 4 times. 



" 9. Pliobothrus tubulatus Pourt., nat. size. 



" 10. Stylaster erubescens Pourt., small specimen, nat. size. 



" 11. The same, branchlet, mag. 4 times. 



" 12. Distichopora foliacea Pourt., nat. size. 



" 13. The same, side view of branchlet, mag. 4 times. 



" 14. Distichopora sulcata Pourt., side view of branchlet, mag. 4 times (see Plate VII., 

 fig. 7). 



PLATE V. 



Fig. 1. Diaseris crispa Pourt., mag. 5 times. 

 " 2. The same, from above, mag. 4 times. 

 " 3. Thecocyathus lrevigatus Pourt., vertical section showing internal roots setting off from 



interseptal chambers, mag. 4 times. 

 " 4. The same, horizontal section through base, showing extremities of internal roots, mag. 



4 times. 

 " 5. Desmophyllum solidtim Pourt., mng. twice. 

 •' C. The same, calicle, from above. 

 " 7. Dendrophyllia cornucopia Pourt., nat. size. 

 " 8. The same, calicle from above. 



'.). Deltocyathus Agassizii Pourt., variety, from the side (sec Plate II., figs. 1 to 5), mag. 



3 times. 

 " 10. The same, from below. 

 " ii. Oculina tenclla Pourt., nat. size. 



