STUDIES 



ON ARTHROPODA 



i. 



BY 



DR. H. J. HAN SEN 



WITH FOUR COPPER-PLATES 



AT THE EXPENSE OF THE RASK-0RSTED FUND 



: >;: : 



COPENHAGEN 



GYLDENDALSKE BOGHANDEL 



KJ0BENHAVN, KRISTIANIA, LONDON, BERLIN 

 1921 



