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FAMILY V.— ANGIAD^. 
The visceral cavity of the corallum in this family is 
not obliterated, nor even subdivided ; the interseptal dis- 
sepiments being merely rudimentary. There is no coenen- 
cliyma^ and the wall is imperforate. 
The plates have notched edges, but not very conspi- 
cuously. 
The corallum is massive. It increases by gemmation ; 
the buds being developed on stolons, or on basal membrani- 
form expansions. 
The corallites are not united by their sides, except 
accidentally by means of their walls, and they remain 
short. 
But one British genus is known, Hoplangia. 
