This periodical , edited iu collaboration with the scientific 

 staff of the establishment, viz. Dr. F. A. Jentink , Dr. A. A. W. 

 HuBRECHT, C. RiTSEMA CzN. and Dr. J. G. de Man Jr., 

 and other naturalists, will be pubH.«;hed every three months, 

 in parts similar to the first number. 



H. SCHLEGEL. 

 Leyden, 

 January 1879. 



