SUBJECT INDEX 



The index has undergone a considerable simplification compared to that of vol. 14, 

 but we believe its usefulness is not much reduced. All research subjects in the Directory 

 of Names and Addresses are represented by at least one entry. The names of investigators 

 refer back to that Directory. 



Headings are printed in capitals. The list of headings has not changed much. New headings 

 are listed on the next page. Headings generally come under one of the following 

 categories: 



1) Structures, e.g. organs, tissues, cells 



2) Substances or classes of substances 



3) Developmental stages, processes, and factors (including metamorphosis, regeneration, 

 developmental genetics, reproduction, developmental pathology) 



4) Techniques. Most of the common techniques that figured as headings in the index of 

 vol. 14 are now omitted, they will be found as subheadings (see below). 

 Techniques still appearing as headings are: Chemical microanalysis, Culture, Immuno- 

 chemistry, Irradiation, Rearing methods, Transplantation, UV Irradiation, Vital 

 staining, X-Irradiation. 



5) General subjects: History, Theoretical biology. 



6) Some groups of organisms: Plants, Unicellular organisms. 



Headings are extensively cross-referenced, but not usually from lower-order to higher- 

 order categories. 



Subheadings take the place of the former entries. Headings having less than ca. 10 names 

 of investigators usually lack subheadings. The same research subject may be listed more 

 than once under the same heading, e.g. under a structure and a technique. 

 Subheadings come under one of the following categories: 



1) Entities subordinate to the heading 



2) Entities related to the subject of the heading 



3) Techniques, disciplines, and processes. These are often chosen from the list appearing 

 on the next page; some of these terms are also used as headings - the resulting 

 redundancy is unavoidable; it is considered rather an advantage because it provides 

 several entrances to the same subject. 



4) Developmental stages; see the list on the next page. 



5) Links with other entities, such as "effect on . . ., effect of . . ., interaction with . . .". 



Animal and Plant Names 



All the work on multicellular plants and on slime moulds 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. 



Throughout the index Classes (and in some cases Phyla) are used exclusively. Excep- 

 tions are: the use of Homo for work on the human species, and the use of Orders under 

 some general headings (Development (general), Development (larval), Development (post- 

 embryonic, fetal), Embryology (general & descriptive), Embryology (physiological), Life 

 cycles, Regeneration, Reproduction). 



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, 

 Embryology, Life cycles, Metamorphosis, Morphogenesis, Plant embryology & morpho- 

 genesis, Regeneration, Reproduction, Unicellular organisms, etc. 



Names of investigators 



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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