OF ILLUSTRATIONS IN THE TEXT. 
. 1. Prohoscina radiolitorum (Orb.), with some transverse 
series of apertures ....... 50 
2. Berenicea papyracea {Ovh.\ vnih goncQomm . . 78 
3. B. phlyctcenosa, Rss., with gonocyst .... 80 
4. B. regularis (Orb.), var. amhita, with selvage . . 93 
. 5. Reptomultisparsa haimei^ Lor 117 
6. Diastopora repens (Hasw.), with young zoarium . . 130 
7. Ihid.^ vertical section 130 
8. D. auricularis (Orb.), partly unilaminar . . .134 
9. Discosparsa simplex (Orb.) 142 
10. ' Cellulipora ornata, Orb., var. devonica^ vertical and 
horizontal sections 146 
11. Crisina, sp., in Phalangella stage .... 159 
12. Tervia gibbera^ n.s]) 174 
13. Reticrisina obliqua (Orb.), vertical and horizontal 
sections 177 
14. R. disticha (Goldf.), with gonocyst . . . .184 
15. Retecava clathrata (Goldf.), longitudinal section . . 189 
16. 72. (Goldf.), longitudinal section . . 195 
17. R. carinata (Rom.) 198 
18. R. geometrica (Hag.), transverse section . . . 204 
19. Pergensella geniculata (Hag.), showing relation of 
lateral and median series 210 
20. Ibid.^ base of a zoarium 210 
21. Sulcocava cristata, Orb. 212 
22. Ibid., longitudinal section 212 
23. Ibid., with sutural cavities 214 
24. Entalophora, sp., base of a zoarium . . . .217 
25. E. madreporacea (Goldf.), with gonoecium . . . 237 
26 & 27. E. gamhlei, bases of two zoaria .... 248 
28. Clypeina tuhceformis, Lonsd. ..... 280 
29. (Goldf.), longitudinal section . . 283 
30. Cyrtopora elegans. Hag., longitudinal section . . 286 
