2 INTRODUCTION. 



2. Upon some points, especially that of Terminology, we feel that the 

 acceptance of our ideas will be more ready and complete if it be shown that 

 they are shared by other and more widely known writers. 



3. While we are responsible for whatever may prove to be erroneous, we 

 are very loth to run the risk of receiving, even from beginners, credit for 

 having first made an observation or an experiment, or first devised an 

 instrument or a mode of manipulation, the honor of which belongs proj^erly 

 to others. 



4. On the other hand, since our statements as to the structure of the cat 

 do not always accord with those of other writers, our own papers are fre- 

 quently referred to in evidence that those statements have already been 

 submitted to competent scientific tribunals. 



§ 3. References. — In the text, the capital letter or Arabi*c numeral 

 directly following an author's name indicates the place of the work or paper 

 upon the List. This letter or numeral is in black letter. 



The second Arabic numeral designates the number of the j5«^e. "When 

 the introductory portions of a book are separately paged the Roman numeral 

 designating the page is preceded by the letter p. 



When a work consists of two or more volumes, the number of the volume 

 in question is indicated by a Eoman numeral placed between the two Arabic 

 numerals. 



When two or more works or papers are referred to after the name of the 

 same author, their letters or numbers are separated by a semicolon. 



The numbers of two or more pages or volumes are separated by commas, 

 or by short dashes when the passages in question extend over several pages. 



For example : Eolleston, A, 10, refers to the tenth page in the body of 

 the work of the "■ Forms of Animal Life." Eolleston, A, p. x, refers to the 

 tenth page of the Introductory portion of the same work. Agassiz, A, iv, 

 10, refers to the tenth page of the fourth volume of the ''Contributions to 

 the ]!^at. Hist, of the U. S." Wyman, 34, 10, refers to the tenth page of the 

 "Anatomy of the Nervous System of Rmia pipiens^'' which was published 

 among the " Smithsonian Contributions to Knowledge," and is hence 

 regarded as a paper. 



On account of the larffe number of citations, we have usually omitted the words 

 vvlume and page and their abbreviations. This is regarded as permissible by Bigelow ; 

 A, 49. 



The following is the mode of reference : — 



Near the end of the book is a "List of Publications referred to." In 

 that list, the names of Authors occur in alphabetical order. 



Under each name, the titles are in two groups, including respectively 

 Separate Books, and Papers published in Journals or bv Scientific Societies. 



