reptoid: Budding from stolon-like expansions of edge 



zone. 



sclerodermites : Primary units of skeleton. Centres of calcifica- 



tion with their fascicles of fibres. Epitheca, basal 

 plates, and dissepiments lack these. They are 

 present in septa and related structures only. 



septa: Radiating vertical plates. 



septotheca: Formed by thickenings of outer parts of septa. 



series: A group of corallites within a common wall. 



simple: A trabeculum composed of a series of single 



sclerodermites. 



stereome: Layer of secondary thickening of septa or re- 



lated parts. 



synapticulae : Rods joining adjacent septa. 



synapticulotheca : Similar to septotheca but not solid. Formed 

 from synapticulae. 



thamnasteroid : Without definite boundaries and with confluent 



septa. 



theca: Wall uniting outer edges of septa. 



trabecula: A vertical series of sclerodermites or centres of 



calcification. 



turbinate: Inverted cone or top-shaped. 



i03 



