336 



FAMILY V.— ANGIAD.E. 



The visceral cavity of the corallun. in this family is 

 not obliterated, nor even subdivided ; the interseptal dis- 

 sepiments being merely rudimentary. There is no ccenen- 

 chyma, 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. 



