STUDIES 

 ON ARTHROPODA 



I. 



BY 



Dr. H. J. HANSEN 



WITH FOUR COPPER-PLATES 



AT THE EXPENSE OF THE RASK-0RSTED FUND 



A L 1'' R E D A, K N P F, I n c. 

 220 West 42nd Street 

 Nev/ York, N,Y« 



1 13.00 



