SUBJECT INDEX 



(alphabetical order) 



Although the Index is intended to be self-explanatory, some introductory 

 remarks maybe useful. 



The Index covers not only embryology, but the whole of developmental 

 biology. It is composed of headings (large capitals) and entries (small print and 

 small capitals). The names printed in small capitals refer to the Directory of 

 Names, where the corresponding research subjects may be found. 



The headings generally come under one of the following categories: 1 ) dis- 

 ciplines, 2) techniques, 3) cells, organs and other body components, 4) sub- 

 stances or classes of substances, 5) developmental stages, processes or factors. 



Since virtually all the entries in the Index refer to developmental processes, 

 the word "development" is omitted unless used in a general sense. In general, 

 an attempt has been made to start the entries with the most informative word, 

 but it was impossible to avoid that entries sometimes start with an adjective 

 of a rather unspecific character, such as: comparative, descriptive, experimen- 

 tal; abnormal, normal; early, late. Such entries are easily overlooked in a search 

 for specific information, particularly in the longer sections. Entries also fre- 

 quently start with such phrases as "effect on/of" and "relation with". Preposi- 

 tions very seldom figure as the first word of an entry (except in the phrase "in 

 vitro"); where they do, they are found at their proper place in the alphabet. 



In order to increase the efficiency of the Index, special care has been devoted 

 to cross-references. Moreover, subjects have been brought under as many 

 headings as possible. This of course results in a certain amount of redundant 

 information, but it is felt that this is outweighed by the greater chance for 

 the user of finding a particular subject he is interested in. 



All the work on multicellular plants and on slime molds is brought together 

 under one heading: "Plant Embryology & Morphogenesis (experimental & 

 physiological)". All the work on unicellular organisms (including unicellular 

 plants) is listed under the heading "Unicellular Organisms". 



Genus and species names are not used in the entries, with the exception 

 of the designation Homo for the human species. For various reasons it is 

 impossible to provide a separate taxonomic index. Those who are looking for 

 work on a specific taxonomic group are advised to start with the headings 

 of a general nature, such as "Asexual reproduction", "Development", "Em- 

 bryology", "Life cycles", "Metamorphosis", "Morphogenesis", "Plant em- 

 bryology & morphogenesis", "Regeneration", "Reproduction", "Unicellular 

 organisms", etc. 



In the case of work carried out jointly by two or more investigators, all 

 collaborators are listed in alphabetical order. Since initials of first names are 

 omitted from the entries, it may sometimes be necessary to check two or more 

 investigators of the same surname in the Directory of Names. 



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