XXXII 



I REGRET that it will be quite impossible to me to enumerate each 

 one of the many, who have kindly placed their time and knowledge 

 at my disposal, whenever I asked them for help. I must here content 

 myself by begging them, one and all, to accept my best thanks. 



There are, however, three men, to whom I am under special oblis 

 gations for their valuable and indefatigable assistance: V. KUHR, 

 M. A. for his competent and careful assistance as regards the philolo* 

 gical part of the work; CARL S. PETERSEN, Librarian at the Royal 

 Library of Copenhagen, for the never failing kindness with which 

 he has let me profit by his extensive knowledge, and R. H. STAMM, 

 M. S., Lecturer at the University of Copenhagen, for much valuable 

 information, especially as regards zoological matters, for all of which 

 I beg these three men to accept my most heartfelt thanks. 



VILHELM MAAR 



