Family 5. OCULINIDAE.--Branching or massive aporose corals, the
calices projecting above the level of a compact coenenchyme formed
from the coenosarc which covers the exterior of the corallum. Typical
genera--_Lophohelia_, M. Edw. and H. _Oculina_, M. Edw. and H.
Family 6. POCILLOPORIDAE.--Colonial branching aporose corals, with
small calices sunk in the coenenchyme. Tabulae present, and two larger
septa, an axial and abaxial, are always present, with traces of ten
smaller septa. Typical genera--_Pocillopora_, Lamarck. _Seriatopora_,
Lamarck.
Family 7. MADREPORIDAE.--Colonial branching or palmate perforate
corals, with abundant trabecular coenenchyme. Theca porous; septa
compact and reduced in number. Typical genera--_Madrepora_, Linn.
_Turbinaria_, Oken. _Montipora_, Quoy and G.
Family 8. PORITIDAE.--Incrusting or massive colonial perforate corals;
calices usually in contact by their edges, sometimes disjunct and
immersed in coenenchyme. Theca and septa perforate. Typical
genera--_Porites_, M. Edw. and H. _Goniopora_, Quoy and G.
_Rhodaraea_, M. Edw. and H.