PLATE VI. 
Fig. ... 1. AIycetophyllia nobilis, ji. 29 ; 1 and la, upper view, and portion of the 
side view of a large corallum ; N. of Alunda7iapooram, Trichinopoly group. 
Fig. ... 2. Heliastkea oktiva, Slol., p. 31; 2, upper view of a corallum; near the right 
end the original surface is preserved, about the middle the surface is wea- 
thered off, and at the left end it is polished ; 2i, enlarged original surface ; 2e, 
weathered surface ; 2r/, polished surface ; 2c, side view of a portion of the 
corallum ; Odium, Ootaioor group. 
Fi g-. ... 3. Heliastrea rotunda^ p. 32^ 3, upper view of the eoralluni^ natural sizej 
3tf, original, 3<^, polished surface ; Moraviatoor, Ootaioor group. 
