CONTENTS 



Introduction 



Changes of address in Europe, received since the appearance of 

 vol. 18, part 1 



Directory of Names and Addresses, with subjects of research 

 (alphabetical order) 



Directory of Institutes, with members engaged in developmental biology 



Africa ^^ 98 



North America 



Canada 99 



Mexico 100 



United States 100 



South America 11^ 



Asia 117 



Australia 124 



Subject Index (alphabetical order) 126 



Book Notices 1^^ 



Contents 1^6 



Index to authors and editors 157 



