exothecal : 

 exsert : 

 extratentacular : 



fan system: 



fenestrate : 



flabelloid : 



f oliaceous : 

 fossa : 

 granulations : 



hydnophoroid : 



intratentacular 



budding : 

 oral disc; 



lamellar : 



laminar: 



massive : 

 meandroid : 



pali: 



paratheca : 

 parietal : 



peritheca : 

 phaceloid : 

 plocoid : 



ramose : 



Extrathecal dissepiments or horizontal plates 

 outside the cup or coral wall. 

 Margins of septa higher than the theca or coral 

 cup. 



When buds are formed from the edge zone 

 or the soft part lying outside the ring of tenta- 

 cles. 



Arrangement of trabeculae inclined outwards 

 from an axis of divergence. Several fan systems 

 may exist in one septum. 



Septum of loosely connected trabeculae with 

 pores of perforations between trabeculae. 

 Meandroid corals with a single linear series or 

 row of polyps. 



Branching in thin expanded sheets. 

 Central cavity of a corallite or cup. 

 Where sclerodermites or centres of calcification 

 inclining outwards emerge at the surface of a 

 septum. 



Corallite centers arranged around conical hill- 

 ocks. 



Buds formed from that part of the polyp sur- 

 rounding the mouth and ringed by the tentacles. 

 That part of the coral polyp surrounding the 

 mouth and ringed by the tentacles. 

 Columella is a vertical plate, free above, lying 

 lengthwise in the long axis of the elongated 

 corallite. 



Septum formed of trabeculae closely united to 

 form a continuous sheet. 

 Forming thick masses. 



Corallites forming groups or series within 

 common walls, so as to form valleys. 

 Inner ends of septa, separated. 

 Wall formed from dissepiments. 

 Columella formed by intermingling of trabe- 

 culae from inner margin of septa. 

 Extrathecal skeleton deposited by coenosarc. 

 Parallel branches forming clumps or tufts. 

 Corallites united by peritheca and not directly 

 by their walls. 

 Branching colonies. 



i02 



