LIST OF ILLUSTRATIONS, 



ENGRAVINGS. 



FIG. PAGE 



1. Millepora alcicornis, Forsk., .... 13 



2. The animal of Millepora nodosa. (After Moseley), . . 14 



3. Pocillopora aspera, var. lata, Verrill. (After Dana), , . 15 



4. Favosites favosa, Goldf. ; and F. Got/ilandica, Lam., . . 16 



5. Syringopora retiformis. Bill. (After Billings), . 18 



6. verticillata, Goldf. (After Billings), . . . 18 



7. Dalmani, Bill. (After Billings), . . . 18 



8. Aulopora tubceformis, Goldf.; and Cladochonus (Pyrgia) Michelini, 



Edw. and H. (After Goldfuss, and Edwards and Haime), , . 20 



9. Haly sites catenularia, Linn. ; and H. agglomerata, Hall. (Original), 22 



10. Tetradiiim minus, Safford. (Original), .... 23 



11. Heliolites megastoma, M'Coy. (Original), .... 26 



12. Labechia conferta, Edw. and H. (Original), . . . 28 



13. Alveopora spongiosa, Dana. (After Dana), . . . 32 



14. Forms of Favosites Gothlandica, Lam. (Original), . - . 48 



15. Favosites hemispherica^ Yand. and Shum. (After Billings), . 67 



1 6. Pachypora Fischeri, Bill. (Original), . 93 



17. Pachypora frondosa, Nich. (Original), . . 95 



1 8. Striatopora flexuosa, Hall. (After Hall), ... 98 



19. Romingeria umbellifera, Bill. (Original), . . . 115 



20. Calices of Alveolites sulorbicularis, Lam. (After Goldfuss), . 127 



21. Michelinia convexa, D'Orb. (After Billings), . . .140 



22. Pleiirodictyum problematicum, Goldf. (After Roemer, and Edwards 



and Haime); and P. stylophorum, Eaton. (Original), . . 145 



23. Diagrams of Sections of Favosites and Pleiirodictyum. (Original),. 149 



24. Sections of Arceopora anstralis, Nich. and Eth., jun. (Original), . 167 



25. Stenopora Jackii, Nich. and Eth., jun. (Original), . . 173 



26. Sections of Stenopora ovata, Lonsd. (Original), . . .174 



