250. Progress of Invertebrate Paleontology in [April, 
PROGRESS OF INVERTEBRATE PALÆONTOLOGY IN 
THE UNITED STATES FOR THE YEAR 1879. 
BY, DR. C. A. WHITE; 
A the operations of men’s minds are not subject to the calen- 
dar, it is difficult to select any specified period of time and 
say just what progress in any one branch of investigation has 
been made within it. Therefore, in this popular review of Ameri- 
can palæontological labors for 1879, both the distal and proximal 
boundaries of the year will be held somewhat loosely. That is, 
in giving a summary of the work done, all writings will. be men- 
tioned which have been published either originally or in their 
latest form, even such as appeared in the earliest days of the 
year; and mention will be made, not only of such works as are 
known to be in press at the close of the year, but also of such as 
are known to be in course of preparation then. These anticipatory 
notices have been made from information kindly communicated 
by the various authors who are referred to. No work, however 
inconspicuous, has been intentionally omitted from bibliographi- 
cal notice, but even the most obscure are mentioned, leaving the 
question of sufficiency or insufficiency of publication to be 
decided by the custom of naturalists. The writer, in connection 
with Prof. H. Alieyne Nicholson, having published a Bibliogra- 
phy of North American Invertebrate Paleontology, which, with 
a supplement, extended to the close of the year 1878, the follow- 
ing account of the publications for 1879 may be made, to serve 
rudely as a continuation of the portion of that bibliography which 
relates to the United States. The reader may readily separate 
this bibliographical matter from the personal gossip, of which the 
article is largely composed. : 
The list of Americans now living who have at some time or 
other, and to a greater or less extent, contributed to the literature 
of invertebrate paleontology, is a rather long one, and yet the 
names of a large majority of them do not appear in connection 
with any publication of the past year. Among the active workers 
in this field is first to be mentioned the veteran palzontologist, 
Prof. James Hall, who is still engaged with his great series oF 
works for the State of New York, upon which he has bestowed — 
the unremitting labor of almost forty years, no one of which has 
been more fruitful of important results than the one just passed. 
