66 CORALS AND CORAL ISLANDS. 
ing leaves are sometimes very large and symmetrical, as in 
the Tridacophyllia, Plate IV., and Merulina, Plate VI. 
2. Fungia tribe, or Functacea.— The general character 
of the simple species of this tribe is mentioned on page 45, and 
the character of the living Fungia, with its tentacles, is shown 
in the figure of a Feejee species on page 46. Large, com- 
pound groups, both massive and foliaceous, are formed by 
budding, and the budding is always superior. There are 
no margins to the disk in this tribe, and in the corallum 
of the compound kinds no wall or partition between the ad- 
jacent stars, and no walls to adjoining polyps, or only im- 
perfect ones. “The polyps consequently coalesce throughout 
by their disks. The simple Fungi are attached when young, 

FUNGIA DANA, BE. & H., REDUCED TO ONE-SIXTH LINEALLY; @,), TEETH OF UPPER 
AND LOWER MARGINS OF SEPTUM, NATURAL SIZE. 
and then would hardly be distinguished from a simple or 
solitary species of the Astrea tribe. 
3. Oculina tribe, or Ocutrnacra.—These species occur 
either simple or compound, and the latter are often branched, 
massive, or encrusting, never thin, foliaceous. Budding is 
either superior, lateral, or basal ; never by spontaneous fission. 
The coralla are remarkable for the solid walls and lamelle 
of the cells; and often for having the ceenenchyma nearly or 
