Advances in
MORPHOGENESIS
Edited by
M. ABERCROMBIE
JEAN BRACHET
Department
of Zoology
Faculte des Sciences
University
College London
Universite Libre de Bruxelles
London, England
Genese/Brabant,
Belgium
THOMAS J. KING
Department
of Biology
Georgetown
University
Washington,
D.C.
VOLUME 7
1968
ACADEMIC PRESS
New York and London