INTRODUCTION 



Subscribers are herewith receiving the supplement to the seventh issue. 



On March 20''^, 1958 the General Embryological Information Service was 

 established as a private Foundation. The Board of the Foundation is constituted 

 as follows: 



Prof. Dr. Chr. P. Raven, Utrecht, President 



J. H. des Tombe, Mr., Utrecht, Secretary-treasurer 



Dr. P. D. Nieuwkoop, Utrecht, Member 



Prof. Dr. P. J. Gaillard, Leiden, Member 



Prof. Dr. M. W. Woerdeman, Amsterdam, Member 



Correspondence concerning editorial and administrative matters should 

 henceforth be directed to Mr. J. Faber, Hubrecht Laboratory, Utrecht. 



Since 1950, the year in which the present subscription price was fixed, the 

 coverage and size of the periodical have increased considerably. The number of 

 collaborators has increased by about 50 %, the number of co-operating institutes 

 by about 75 %, and the number of pages (free supplement included) by about 

 50 %. Moreover a number of new chapters were opened during this period. 

 An increase in price has therefore become inevitable. Starting with the eighth 

 full issue (1959), the subscription price has been fixed at H.fl. 28.50 (i.e. 

 $7.50). 



Information regarding the international team work project of the Hubrecht 

 Laboratory will be found in the section "Communications from the Hubrecht 

 Laboratory" on page 15 



P. D. NIEUWKOOP 



