TURBINARIA. 21 



It seems to me certain tliat we are rapidly Hearing the time when our ever-increasing 

 collections, revealing as they do the infinite grades of variation presented by living organisms 

 — especially by stock or colony-forming animals, such as Corals in which the varying factors 

 are doubled — will compel us to break loose from the restraint of the Linnean " species." 



It should be stated, in conclusion, that in cataloguing the specimens under each heading, 

 I have been guided by morphological rather than by chorological considerations. If the 

 collection were complete it is probable that the two would coincide, i. e. we should see the 

 transformations in external structure following definite geographical lines. Large as the 

 Collection is, both it and our knowledge are far too fragmentary for us to hope, for a long time 

 to come, to be able to express the morphological variations by definite sequences of geographical 

 names. 



