ANTIIOZOA. 71 



Full-gT(j\vii corals are not always liiitre masses; tla-y n • • ' uf 

 great delicacy and beauty, as is shown l»y Fig. 1h, \vhi< li ■ u 



TridacophijlUa manidna, and by tbc three succeeding W h 



represent various deep-sea corals, Case Xh. The discovery of life ut 

 great depths — depths as great as the heights of some of the highest 

 mountains of the world — was one of the most inten-stii ' '* 



of the second half of the last century, and has led to a u'. ... ..,■ .. um; 



in 3ur knowledge of the globe we inhabit. 



