548 THE GREAT BARRIER REEF. 



CHROMO I'LAIK VI. 

 GREAT BARRIER REEF CORALS 



Figs. I and 5. — Plesiastrwa Pcronii, p. 166. Coratla with fully-expanded polyps of diverse 



colours, natural size. 

 Fig. 2. — Plcsiastra'n vcrsipora, p. 166. Corallum with expanded and contracted polyps, natural size. 

 Fig. 3. — Rhodarwa sp., p. 187. Corallum with expanded and contracted polyps, natural size; 



3A, single polyp, horizontal view. 

 Fig. 4. — Rhodara'a frnticosa, n.sp., p. 187, with expanded and contracted polyps, natural size ; 



4A, horizontal view of isolated polyp. 

 Pigs. 6 and 9. — Rhodaraa ailiciilans, p. 187. Coralla with expanded and contracted polyps, of 



diverse colours, natural size ; 6a and 9A, isolated polyps, slightly enlarged. 

 Fig. 7. — Cyphastrwa sp., p. 166. Corallum with expanded and contracted polyps, natural size. 

 tig. 8. — MiUcpora alciconiis, p 202. Portion of a corallum with retracted polyps, natural size; 8a, a 



single polyp system, slightly enlarged ; 8b, a polyp system with extended polyps, considerably 



enlarged (after Moseley) ; 8c, central nutritive polyp, further enlarged (after Moseley). 

 Fig. 10. — Rhodarcca s^., p. 187. Corallum with polyps expanded and contracted, natural size; 



lOA, isolated polyp, horizontal view. 

 Fig. II. — Montipora scabriaila (appr. ), p. 185. Portion of corallum with contracted polyps, natural 



size ; 11 a, isolated polyp, with fully-expanded rudimentary tentacles, considerably enlarged. 

 Fig. 12. — Hetcropsammia Michdini, p. 177. Corallum with expanded polyps, natural size. 

 Fig. 13. — Fiingia crassitaitaculata, p. 173. Fully-expanded polyp, natural size. This figure is a 



reproduction of the photograph in the Photo-mezzotype plate, No. XXIII., coloured from 



life. 13A represents a single tentacle of a dark olive-green example. 

 Fig. 14. — Fungia crassitentaculata, p. 173. Two young attached coralla with their associated 



polyps, springing from a single proliferous stolon or " nurse-stock." 

 Figs. 15 and 16. — Cycloscris cycloHies, p. 176. Corallum, lateral view, with extended tentacles, 



natural size; 15, oral area, slightly enlarged ; i6a, isolated tentacle. 

 Fig. 17. — Herpetolitha talpina, p. 176. Corallum with expanded polyps, natural size; 17A, 



isolated tentacles, slightly enlarged. 



