X CHARACTERS OF FAMILIES^ ETC. 



and containing neither dissepiments nor synapticulae. Walls 

 tliin^ lamellar, imperforate. Septa liiglily developed, simple, 

 compact. Costae usually well marked and straight. 



Sub-family — C aryoph yllin.e , 

 Calicule presenting one or more rows of pali, placed between 

 the columella and the septa. 



Group — Trochocyathace^. 

 Pali of divers orders, forming two or more coronets. 



Sub-family — TuRBiNOLiNiE. 

 Corallum destitute of pali. The septa extending to the 

 columella, or meeting in the centre of the visceral chamber. 



Family — Oculinid^. 



Corallum composite, j)roduced by gemmation, and presenting 

 in general an abundant, compact coenenchyma or common tissue, 

 the surface of which is smooth, delicately striate near the calices, 

 or slightly granular, but never echinulate. Walls of the coral- 

 lites complete, not distinct from the coenenchyma, and increasing 

 by their internal surface, so as to invade progressively the inferior 

 part of the visceral cavity, and to fill it up more or less in old 

 age. Loculi imperfectly divided by a few dissepiments ; no 

 synapticulse. Septa entire, or having their upper edge slightly 

 divided. 



Family — Astr^id^. 



Corallum composite or simple, circumscribed by imperforate 

 walls, and often increasing by fissiparity. Corallites becoming 

 tall by the progress of their growth ; each individual or series of 

 individuals well defined, and separated from the others by perfect 

 walls. Coenenchyma none, or formed either by the development 

 of the costcC and their dissepiments, or by the epithecal tissue 

 alone. The visceral cavity never obliterated inferiorly by the 

 growth of the walls, but subdivided and more or less completely 

 closed up by the interseptal dissepiments, which are generally 

 very abundant. 



Group — Cladocorace^. 



Corallum increasing by lateral gemmation. The corallites 

 segregate, and having an arborescent or fasciculate arrangement. 

 Septa regularly and delicately serrated; those of the principal 

 cycla bearing pali. 



