by Dr. Nordgaard's appreciation when, after having looked through 

 the work, he wrote to me: "I can say with safety that it would 

 have been a great pity if Levinsen's posthumous manuscript had 

 not been printed." And with this remark of the distinguished spe- 

 cialist in the bryozoa I deliver Levinsen's work to the public, 

 feeling convinced that the late author will not be held responsible 

 for its deficiencies, as he had no opportunity either to complete it 

 or to subject it to a last revision. 



Copenhagen, May 20. 1916. 



Ad. S. Jensen, 



Director of the 2nd Division of the Zoological Museum 

 of the University. 



