Index to the Species of Mollusca Introduced from 1850 to 1870

names of fossil Cephalopoda are restricted to those
included in genera that are used in the Recent. An
asterisk (*) is used to indicate names and publications
not seen in their entirety by the present compiler, but
were quoted from another source.
As time passed, malacologists may have used names
that were originally introduced as subspecies, varieties,
forms or even descriptive adjectives. As an aid
to the modern worker, these trinomials are included,
without interpretation, to show their origin. However,
those that were obviously infrasubspecific were disregarded.
The bibliography includes literature published during
1850-1870, whether or not new taxa were introduced,
and later references consulted to verify inclusions.
Papers listing names of fossils found in deposits
were all too numerous and were omitted, since they
served only to lengthen the bibliography.
The last part of this work is a listing of the species
arranged under their genera to assist the modern
worker.
Like Sherborn, I, too, could have used thirty years
to perfect this compilation, and the scholar will probably
find omissions and points for disagreement, but
every contribution has a point of termination. Mr.
Sherborn (1922, 2:ix) stated, that "although much
time has been expended in trying to secure the endless
combinations and permutations of specific names, it
is felt to be impossible for one human being to attain
completeness in this direction by reason of the colossal
amount of literature to be dealt with."
When one arranges all the malacological publications
in chronological order, there develops a picture
of the workers and the times in which they worked
including the inventions, expeditions, colonizations,
and wars. It became obvious that the authors had
SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
their own ideas and frequently disagreed, which
caused one author to comment as he changed the
name of a valid species, "What could induce him to
impose so strange a name to distinguish so lovely a
shell."
ACKNOWLEDGMENTS.—This paper should really be
listed under joint-authorship but no press or bibliographer
would accept all my "co-authors," without
whose valuable assistance it would have never materialized.
I am deeply indebted to Walter J. Byas,
Arthur H. Clarke, Harry S. Ladd, Catherine L. Lamb,
Joseph P. E. Morrison, Harald A. Rehder, Joseph
Rosewater, Division of Mollusks, National Museum
of Natural History; Carolyn S. Hahn, Jack F. Marquart,
Betty J. Swartz, Smithsonian Libraries; Norman
F. Solh, Druid Wilson, U. S. Department of
Interior; David H. Stansbury, Museum of Zoology,
Ohio State University; Richard I. Johnson, Museum
of Comparative Zoology; Richard E. Petit, North
Myrtle Beach, North Carolina; John Peake, John
Taylor, Kathy Way, British Museum (Natural History);
and the many libraries throughout the world
who loaned material.
[Note: Florence A. Ruhoff retired at the end of 1976,
and the author's tasks of proofreading were assumed
by the staff of the Department of Invertebrate Zoology
(Mollusks), National Museum of Natural History.
Since supplements to this work are anticipated, it will
be of great help if persons finding omissions and
errors will apprise the staff at the following address:
Dr. Joseph Rosewater, Department of Invertebrate
Zoology (Mollusks), National Museum of Natural
History, Smithsonian Institution, Washington, D. C.
20560.]