Art. IX.— Stifjpleanent to the Bal>Iio§Tapliy of ;^ortIi 

 Aiitftericaii Invertebrate Paieoiatolog^y. 



By C. A. White aaad H. Alleyne JVicholson. 



PART I 



PUBLICATIONS MADE IX THE UNITED STATES.— By C. A. 



White. 



preface to part i. 



The Bibliography of North American Invertebrate Paleontology, which 

 was published last year as Miscellaneous Publications No. 10 of the 

 U. S. Geological Survey, was brought down to the close of 1877. The 

 following Supplement embraces the publications which have been made 

 during the year 1878, and also all the omissions pertaining to the first 

 publication which have been detected. 



The year 1878 has not been productive of many pubUcations of North 

 American Invertebrate Paleontology, and the larger part of the entries 

 in this Suj)plement are, therefore, such as supi)ly the omissions referred 

 to. As to these entries of previously omitted publications, some of them 

 ought to have been included in the original work, in accordance with 

 the plan announced in its Preface; but a considerable proportion of 

 them were intentionally excluded from it, as not being within its then 

 proposed scope. It was then intended to jirepare the work mainly as 

 an annotated catalogue of the publications which would be constantly 

 needed by the working paleontologist, rather than as a finished Bibli- 

 ographj", such, for example, as Dr. Coues's Bibliography of North Ameri- 

 can Birds. 



The difiQculty then experienced in fixing a limit to the scope of such a 

 work has increased rather than diminished since the original work was 

 published, by the expressed desire of some of those who are interested 

 in the work to see its scope extended. I have, therefore, admitted some 

 entries of mere catalogues of fossils, and some, also, of works which, 

 according to the rules recognized by naturalists, are not regularly pub- 

 lished. In these cases, however, those facts are stated in the entry, and 

 they may be easily discriminated bj^ the working ijaleontologi.st who is 

 in search of other matter. Many persons have assisted me, but I am 

 under especial obligations to my friend Mr. S. H. Scudder in this respect. 



C. A. W. 

 143 



