92 DESCRIPTION OF THE TLATES. 



PLATE III. 



;. 1. Li^ptocyatlius S iinpsonii Poiirt., mag. 4 times. 



'2. Tlio same, from above. 



3. The same, from below. 



4. CaMosmilia fecunda Pourt , mag. twice. 



5. The same, ealicle, 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.) 



G. Galaxea eburnea Pourt., mag. twice. 



7. The same, ealicle from above. 



8. Ceratocyathus prolifer Pourt., specimen showing mode of budding from ealicle of 



parent, nat. size. 



!>. The same, ealicle from above, mag. 3 times. 



10. The same, vertical section, showing dissepiments. 



1 1. Steno<'yathus vermiformis Pourt., specimen with calicles at both ends, nat. size. 



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



13. The same, jiart of horizontal section, showing small cavities comnuinicating with 



interscptal chambers. 



14. Allopora miniacea Pourt., nat. size. 



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

 IC. The same, ealicle, mag. 10 times. 



1 7. Lepidopora eochleata Pourt., nat. size. 



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



19. The same, vertical section, mag, about .'>0 times. 



PLATE IV. 



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



" 2. The same, ealicle 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 tloridana Pourt., mag. twice. 



" 6. The same, ealicle 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 la-vigatus Pourt., vertical section showing internal roots setting oil" from 



interscptal chambers, mag. 4 times. 

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



4 times. 

 " 5. Dcsmophyllum solidum Pourt., niag. twice. 

 " fi. The sanu', ealicle, from above. 



7. Dendrophyllia cornucopia Pourt., nat. size. 

 " 8. The same, ealicle from above. 

 " !». Dcltoi'vaihus Agastizii Pourt., variety, from the side (see Plate II., figs. 1 to 5), mag. 



3 times. 

 " 10. The same, from below. 

 " II- "culina tcuclla Pourt., nat. size. 



