Although we have endeavored to make this catalogue as complete
and accurate as possible, we feel that errors and omissions are,
from the nature of the case, unavoidable. The material is so vast
and heterogeneous, and is so much scattered throughout numberless
reports, bulletins, journals, and the like, that its correct
compilation is attended with great difficulties. However, a beginning
is here made which will render subsequent work easier. Owing to the
great number of discoveries which have since been made, Dr. Leidy's
excellent catalogue of 1871 covers now but a very small portion of
the ground.
In this list we have made no attempt to decide disputed questions of
priority and synonymy. Doubtless, many of the genera and species here
given will be found to be synonyms of American or European forms;
but at present these questions cannot be settled. Where synonyms
are given, they are the determinations of the original describer
indicated in subsequent publications