136 PERCY SLADEN TRUST EXPEDITION 



Plate 18. 



Fig. 1. Leptastrea roissyana, Ed. and H. Typical form. Enlarged view of PI. 19, fig. 1. x 2. 



Fig. 2. Leptastrea ehrenhergana, Ed. and H. No. 8 on p. 71, region with small corallites. x 2. 



Fig. 3. Leptastrea solida (Ed. and H.). No. 11 on p. 71. x 1^. 



Fig. 4. Id. Typical form, two double corallites. Enlarged view of PI. 19, fig. 6. x 2. 



Fig. 5. Id. No. 14 on p. 71, showing three giant corallites. x 2. 



Fig. 6. Id. No. 12 on p. 71, also with giant corallites. x 2. 



Fig. 7. Leptastrea ehrenhergana, Ed. and H. No. 8 on p. 71, region with large corallites. Cp. fig. 2. j 

 x2. 1 



Fig. 8. Leptastrea solida (Ed. and H.). Figured type of Cyphastrea bottai, Ed. and H., Paris, x 3. 



Plate 19. 

 Fig. 1. Leptastrea roissyana, Ed. and H. Typical form, enlarged on PI. 18, fig. 1. x ^. 

 Fig. 2. Id. No. 2 on p. 71. x 1. 



Fig. 3. Leptastrea ehrenhergana, Ed. and H. No. 6 on p. 71. x 1. 

 Fig. 4. Id. No. 5 on p. 71. x 1. 



Fig. 5. Leptastrea solida (Ed. and H.). No. 15 on p. 71. x 1. 

 Fig. 6. Id. Typical form, enlarged on PL 18, fig. 4. x 1. 



Plate 20. 

 Fig. 1. Faviafavus (Forsk.). From Red Sea, var. 2. x 1. 

 Fig. 2. Id. From Seychelles, var. 1. x 1. 



Fig. 3. Id. From Red Sea, var. 1, deep corallites and weak columella, x 1. 

 Fig. 4. Id. From Red Sea, var. 2. x 1. 



Fig. 5. Id. From Red Sea, enlarged view of PI. 32, fig. 1. x 1. 

 Fig. 6. Id. From Red Sea, typical form, x 1. 



Fig. 7. Diploastrea heliopora (Lam.). From Minikoi, edge region, x 2. 

 Fig. 8. Id. One of the types of Astrea heliopora, Lam., = Heliastrcea heliopora, Ed. and H. x 1. 



Plate 21. 

 Fig. 1. Favia favus (Forsk.). From Red Sea. Gorallite rims distinct as in Group I. x 1. 

 Fig. 2. Id. From Red Sea. Corallum with distorted growth due to imfavourable conditions, x 1. 

 Fig. 3. Id. From Red Sea. Heavy corallum with thickened walls and small corallites, var. 2. x 1. 



Fig. 4. ?Id. Gardiner's i^. yersijoo?-a. Cp. Klunzinger's figure of i^. eAre;i6er^i. x 1. 

 Fig. 5. Id. T^Ype of Favia roussea-ui, Ed. and H., Paris, x 1. 



Fig. 6. ? Id. Type of F. affinis, Ed. and H., Paris, x 1. 

 Fig. 7. Id. One of the types of i'^awia Jacgwrno^i, Ed. and H., Paris, x 1. 

 Fig. 8. Id. Type of Astrea denticulata. Lam., Paris, x 1. 



