426 The Protozoa of Sandusky Bay and Vicinity. 
papers aside from monographs have not been listed. It seems 
important to get these American papers together and find out 
just what has been done by American workers and what our 
fauna contains. An attempt to establish a synonomy may be 
made later. The task of arriving at any scientific classification 
of Protozoa is exceedingly difficult owing to the fact that no 
type specimens are preserved and many papers have been pub- 
lished not only with inadequate descriptions but with poor draw- 
ings and no bibliographies. One can sometimes overcome the 
difficulty presented by a poor description provided the drawing 
is fair, and he may even form some conception of what the author 
had in hand with poor descriptions and drawings if he knows 
what papers he was describing from. Bibliographies heretofore 
have been very rarely given with American papers. While there 
are undoubtedly many good species described, the difficulty of 
determining just what has been done is very great. While this 
bibliography may omit a few papers it is practically complete for 
American authors up to 1904. 
A portion of this work was done while acting as field assist- 
ant for the United States Fish Commission. The writer is under 
obligations to the trustees of the Emerson McMillan Fund of the 
Ohio Academy for assistance in securing literature, especially 
some of the more expensive papers. 
The author desires to express his obligations to Prof. Herbert 
Osborn, Director of the Lake Laboratory at Sandusky. 
O. S. U. Lake Laboratory, 
Cedar Point, Sandusky, Ohio. 
