Review of Recent Geological Literature. 61 
of the degree of incompleteness of the copies they may be able to con- 
sult. It is, indeed, surprising to learn that among the fourteen copies 
which Mr. Harris has located in the principal libraries and private col- 
lections of our country, not one complete edition has been found, a 
remarkable circumstance, which, while it has long made desirable the 
republication of Conrad's work, constitutes at the same time an unfor- 
tunate reminder of a painfully bitter scientific controversy between two 
able and distinguished co-workers. Besides an important table of con- 
tents and the introduction which includes several pages of very val- 
uable bibliographic information gathered during a long and painstak- 
ing search of the extant copies and among library records, this "repub- 
lication" contains the entire work as published by Conrad, consisting 
of the following parts: No. 1, probably published at about the date 
given, Oct. 1, 1832. with both the original and revised forms of dedica- 
tion and preface; No. 2; No. 3, dated August, 1833 on the front cover, 
and Aug. 24 on the back cover, probably distributed about the first of 
September, and republished by Capt. Vogdes in 1879; No. i, dated Oct. 
1883, on the front cover, Nov. 1 on the back, probably distributed 
about the 26th of November, and reprinted by Capt. Vogdes in 1879; 
and the much enlarged and illustrated republication of No. 3, dated 
March 1, 1835, with both the original and revised forms of the "Observa- 
tions on the Eocene deposits of the United States,"' the original (the 
more common form ) having been published about March 1, 1835, while 
the revised form, from data obtained by Mr. Harris, is believed by him 
to have been published in 1836 or 1837. In preparing the present edi- 
tion Mr. Harris has reproduced the various parts and editions with 
original pagination, lining, italicising, punctuation, orthography, capi- 
talization, and with covers of the original color, bound in place, together 
with excellent lithographic reproductions of the eighteen original 
plates, so that this "republication" is essentially a fac-simile edition of 
all the parts in all the different forms that Conrad ever published un- 
der the above title. For convenience of reference the whole volume is 
supplied with a running pagination bracketed at the bottom of the 
pages. Properly speaking, the original work of Conrad ends with page 
56 of the revised third part and plate 18, but Mr. Harris has further 
increased the value of the volume by including an index and two addi- 
tional plates found in a so-called appendix to the copy in the Museum 
of Comparative Zoology at Cambridge, Mass. Plate 20 is numbered 
very faintly on the original, and all the figures but one, which i6 evi- 
dently Cytherea nuttalii Con., are named in lead pencil on the plates. 
Mr. Harris regards these plates as possibly "proofs for a contemplated 
number that should embrace a revision of the Claiborne bivalves simi- 
lar to that of the univalves (Republication of No. 3.)'' It is wholly un- 
necessary to remark on the value of or interest in this complete repub- 
lication. Paleontologists and geologists are greatly indebted to the 
painstaking and ability as well as the enterprise, coupled with consid- 
erable financial risk in a work of this nature, with which Mr. Harris 
has prepared this excellent presentation. 
