14 

 General questions and announcements 



I The Hubrecht Laboratory 



From January 15th till August 15th, 1956 the second international team 

 work on embryology was held in Utrecht under the direction of Dr. M. E. 

 Rawles (Baltimore. Md.. U.S.A.) and Dr. P. D. Nieuwkoop. The team 

 consisted of eight members from seven countries of four continents, viz.: 



Mr. R. Azoubel (B.M.). Recife. Brasil 



i. Buviikozer (M.D.). Ankara, i urkey 

 Mr. H. U. Koecke ( Ph.D.). Cologne, Germany 

 Mr. E. V. Mina (M.D.). Alexandria. Egvpt 

 Miss I. Oikawa (Ph.D.), Kochi. Japan 

 Miss M. Richter (B.Sc). Amsterdam, Netherlands 

 Mr. T. Seno (B.M.). Maebashi, Japan 

 Mr. P. H. S. Silver (Ph.D.). London. England 



The topic of this team work was: "A causal analysis of the development 

 and differentiation of the neural crest in Vertebrates." 



Only a short joint note will appear, giving the distribution of the various 

 subjects among the members of the team. The members will publish their 

 work individually in due course. 



A third international team work on embryology will be held from March 

 15th till September 15th. 1958 under the direction of Prof. Dr. Chr. P. Raven 

 and Dr. P. D. Nieuwkoop (both at Utrecht, Netherlands). The topic of this 

 team work will be: "A morphological and physiological analysis of regulative 

 and non-regulative processes in the development of "mosaic" eggs of several 

 terrestrial and freshwater invertebrates." 



Postgraduates, interested in participation in this team work are kindly 

 requested to send in preliminary applications at their earliest convenience. 

 Preliminary applications must be sent in before May 1st, definitive applications 

 before September 15th, 1957. 



Applications should be accompanied by two letters of recommendation by 

 well-known scientists, and should contain extensive information about scientific 

 education and personal record. 



Further details and information will be given in a general circular, which 

 will be distributed in the beginning of 1957. 



II The Central Embryological Library and the Cen- 

 tral Embryological Collection 



For data regarding these two institutions we refer to the sixth full issue, 

 1955. page 182—183. 



III The Normal Table of Xenopus laevis 



We have the pleasure to announce that this composite work has now 

 appeared under the title "Normal Table of Xenopus laevis (Daudin). A 

 systematical and chronological survey of the development from the fertilized 

 egg till the end of metamorphosis", edited by P. D. Nieuwkoop and J. Faber. 

 The book, which comprises 244 pages and 10 plates, is sold at a price of 



