THE MOUNT DESERT REGION 29 



The users of Surveys might well be warned to beware of 

 traditional identifications. These are of two kinds: First, 

 that the names used in any given survey are necessarily fixed. 

 This, of course, is not true. Zoological names change from 

 time to time, sometimes for good and sometimes for insuffi- 

 cient reasons. Secondly, the publication of one or more spe- 

 cies as occurring in a region is obviously no proof that those 

 are the only species in that particular group which do occur. 



We have been careful in these publications to hold to the 

 original names of places that have come down since they 

 were first given. We have paid no attention to some fanciful 

 names recently given. The mountains on the island that 

 have gone down in zoological literature under their original 

 names have been renamed and with what imagination! One 

 huge mass of granite now bears the name of 'Flying- 

 Squadron ' ! 



The Foraminifera, Platyhelminthes, Echinodera, and Arth- 

 ropoda were identified and the notes written by Dr. Charles 

 H. Blake. The sorting and measuring of the spicules of the 

 Porifera w^as done by Dr. Edwin R. Helwig, who also looked 

 up literature on this group; the notes were edited by 

 Dr. Charles H. Blake. Doctor Helwig also listed the Coelen- 

 terata and Echinodermata. The Nemertinea, Polychaeta, 

 Oligochaeta, and Gephyra were assembled and sorted by 

 Dr. Victor C. Twitty, Dr. J. E. Morrison, and Philip B. 

 Powers, and some of the notes written by Mr. Powers. I am 

 greatly indebted to Dr. A. L. Treadwell for identifying the 

 Vermes material of our first three years' collecting, which 

 was most helpful in the later years, also for his counsel and 

 the scheme of general classification which has been followed. 

 The Hirudinea were identified by Dr. J. E. Morrison and 

 Dr. Charles H. Blake and the notes written by the latter. The 

 identifications of the Chordata were made by Dr. Henry C. 

 Tracy. The Mollusca were identified and notes written by 

 William Procter. 



