158 



LIVING FOSSILS. 



(Aiitedoti) ; althougli the latter, tog-ether with many other 

 subsequently discovered, species, was a true crinoid. For 

 a long period these living crinoids were supposed to be of 



Pcntacriuid. 



extreme rarity, only a few examples being from time to 

 time procured. With the development of deep-sea 



