names of animals have been uniformly italicized 

 with only the generic name capitalized regard- 

 less of the typographic treatment in the orig- 

 inal. Suprageneric names are capitalized but 

 not italicized. These matters are considered to 

 be within the province of the bibliographer 

 since fidelity to the source (which may be 

 capitalized throughout) is impossible. 



Theses, inaugural dissertations, etc. These are 

 cited as books and in the conventional manner 

 except that the publisher as well as the Univer- 

 sity is given. To assist in locating these in librar- 

 ies which do not catalogue this class of litera- 

 ture by author, the "Faculty" is indicated by 

 abbreviation in parentheses. 



Date of publication. The establishment of the 

 actual date of publication, granting that agree- 

 ment on what constitutes publication can be 

 reached, is notoriously difficult. This is espe- 

 cially true for the older files of journals, but also 

 for certain current (though not modern) jour- 

 nals. Where ascertainable from tables of con- 

 tents, title pages or covers the actual date of 

 issue is employed; as second choice any date 

 placed on the title page by the editor as an offi- 

 cial date is used. The printer's date appearing 

 as a part of his imprint is taken only as a last 

 resort since it often represents merely the date 

 ofpublicationofthe title page. For publications 

 of societies the principal date (not enclosed in 

 brackets) is the year for which the volume is 

 published since this must often serve as a vol- 

 ume number. Where the actual date of publica- 

 tion is diflPerent it is usually given in square 

 brackets. In this we have followed the practice 

 of most libraries, which we feel is justified since 

 the function of the bibliography is to lead the 

 reader to the literature without confusion. 

 Questions of priority, etc. are matters for sepa- 

 rate investigation and textual comment. 



Collation. The number of a series is indicated 

 by printing the series number in roman type and 

 enclosing it in parentheses; it always immedi- 

 ately precedes the volume number. "New se- 

 ries" and "neue Folge" are indicated by "n.s." 

 and "n.f." The volume number o'c its equivalent 

 (tome. Band, annee, Jahrgang, etc.) is denoted 

 by a numberprinted in bold-faced ty^&.Number, 

 Heft, fasciculus, half -volumes, etc. follow the 

 volume number and are enclosed in parentheses, 

 but are included only under two circumstances: 

 (i) when the volume is not continuously paged; 

 (ii) when the volume appears in two half-vol- 

 umes. In the latter case, knowledge of the 



number of the half-volume often avoids con- 

 fusion in withdrawing journals from libraries. 



Pagination, plates and tables. Final pages are 

 invariably given. Failure to do this is false econ- 

 omy of time and printers' ink, which often 

 causes inconvenience and waste of effort by 

 concealing from the reader whether he has to 

 deal with a paragraph abstract or an extensive 

 monograph. For articles with separate pagina- 

 tion, the total number of pages is written. 

 Plates, tables, maps, etc. with a pagination 

 distinct from the text are treated in a parallel 

 fashion, i.e. inclusive numbers or total number 

 being used depending on how they are num- 

 bered. 



Titles in languages demanding a special alpha- 

 bet are not given in the original language, nor, 

 with a few exceptions, are they transliterated. 

 Such titles are, however, often given in transla- 

 tion into one of the common languages; they 

 are enclosed in parentheses when drawn from 

 original publications having bilingual tables of 

 contents and in square brackets when supplied. 



ABBREVIATION OF JOURNAL 

 TITLES 



In this we have followed A world list of 

 scientific periodicals published in the years 1900- 

 1933, 2nd ed., London, with occasional minor 

 corrections of obvious errors. Abbreviations 

 marked with an asterisk have not been found 

 in the World list, and are expanded in an Ap- 

 pendix, which should be consulted for further 

 details. 



The abbreviations provided by the World list 

 are admirable for the balance struck between 

 compactness and completeness, and for the re- 

 spect shown for usages in languages other than 

 English. The abbreviations with a few excep- 

 tions are self-explanatory, especially if the fol- 

 lowing rules be noted. 



L Nouns have capital, adjectives small, initial 

 letters. Exceptions are that in English titles, 

 adjectives derived from proper names, as 

 well as noun-adjectives, and adjectives used 

 as nouns are capitalized. 



2. Prepositions, articles and the conjunction 

 "and" are omitted wherever possible. The 

 latter or its equivalent is retained if the title 

 consists only of two nouns connected by 

 "and," and where it connects broken com- 

 pounds. 



[xviii ] 



