MADEEPOEARIA OF THE DEEP SEA. 



337 



Distribution of the Species in the Eecent and Past Faunas. 



Resume. 



1. That the deep-sea corals differ from the reef-building forms in not possessing 

 certain important coenenchymal structures. 



2. That deep-sea corals have been dredged up from a depth of 1094 fathoms. 



3. That deep-sea corals live in very different temperatures, from 29°-9 to 56°-3 

 Fahrenheit. 



4. That the growth of deep-sea corals is very vigorous at great depths and in low 

 temperatures. 



5. That the variability of deep-sea species is very great. 



6. That genera and species exist at great depths which are unknown elsewhere. 



7. That the horizontal distribution of many deep-sea forms is great. 



8. That the present deep-sea coral faunas contain species and varieties of species of 



3b2 



