224 
BALL. 
as Nos. 3 and 4 of the first series, but containing new mat¬ 
ter, plates, and the specific descriptions rearranged to bring 
all of one genus together, while remarks and some synonymy 
are attempted. In most copies of the whole work, so called, 
the original sheets of Nos. 1 and 2 are bound up with the 
paper of 1835, but it would seem that the sheet containing 
pp. i-viii must have run short and been reprinted, since M. 
de Gregorio has a copy where the dedication is signed “ T. 
A. Conrad,’ 5 and in which the preface commences on page 
v instead of iv, as in the original; otherwise it would seem 
to be an exact reprint of the original. Of the paper of 1835, 
usually though inexactly called the “reprint,” there are two 
editions. The first edition had grayish green paper covers, 
a geological map of Alabama, but no title other than that 
printed on the cover, which reads: 
Vol. 1. No. 3. | Fossil shells | of the | Tertiary forma¬ 
tion | of | North America. | — j By T. A. Conrad, | Member 
of the Academy of Natural Sciences | of Philada. and Geo¬ 
logical Society | of Pennsylvania. | — | Contents: | Eocene 
Fossils of Claiborne, | with observations on this formation 
in the United States, | and a geological map of Alabama. | 
Republished, with plates, March 1, 1835. | 
Then follows [p. 29, beginning but not paginated] “ Ob¬ 
servations on the Eocene deposits of the United States,” 
pp. 29-36. In the course of the printing, apparently, a cor¬ 
rection was made in the text, p. 35, where, line 11 from the 
bottom, for “Saurian family,” “ Enaliosauri ” has been sub¬ 
stituted, but without any other change of type. At the end 
of the “ Observations,” p. 36, a paragraph begins: “ The 
following names are adopted for the American Tertiary 
formations,” which are in their order “ Newer Pliocene,” 
“ Older Pliocene,” “ Miocene,” “ Eocene,” typical localities of 
which are mentioned. Then follows the following note: 
“ It is necessary to observe that all the species of Eocene 
fossils described in the following pages, unless where credit 
is given or no reference made, were published before Mr. 
Lea’s “ Contributions to Geology.” Number 1 was published 
