PUBLISHER'S NOTICE. 



For some years there has been a constant and increasing demand 

 for a thorough and reliable text-book on the Anatomy of the 

 Invertebrata ; and no other book having appeared upon the subject 

 to meet the requirements and to supersede Dr. Burnett's translation 

 of Von Siebold's Lerhbuck der vergleichenden Anatomie^ which, to- 

 gether with the translator's valuable and extensive notes, is believed 

 to be incomparably the best and most complete treatise on the 

 science, and the same having been highly commended by Professors 

 Agassiz, Silliman, Hitchcock and others, the publisher feels him- 

 self justified in offering this edition to the student, confident that it 

 will supply a want not at present met by any other work in our lan- 

 guage. 



Boston, May, 1874. 



