OPTAFTK^ III. 



CONTRIBUTIONS TO THE PALEONTOLOGY OF OHIO. 

 By R. P. Whitfield. 



[ Reprinted by permission from the Annals of the New York Academy of Science. Read 



October 13, 1890.] 



I. Descriptions of Fossils from the Paleozoic Rocks of Ohio. 



In submitting for publication the following descriptions and obser- 

 Yations of Ohio fossils I feel it due to myself to account for its detached 

 and apparently incomplete character, to state that this arises from the 

 fact, that it is essentially a report on certain groups of fossils submitted to 

 me, partially for the purpose of ascertaining their horizons or for de- 

 termining their relations to other beds the horizons of which were sup- 

 posed to be already known. In the effort to carry out these objects, be- 

 sides the specimens and information which I have received from Dr. 

 Newberry, I have been aided by the loan of specimens and by other as- 

 sistance from President Edward Orton, of the Ohio State University, 

 and by the Hyatt Brothers, students in that institution, who have fur- 

 nished me much information in regard to localities and horizons of dif- 

 ferent species, as well as lists of those known to occur in particular 

 beds in the vicinity of Columbus ; and also with specimens from their 

 private collections. To the late Rey. E. B. Andrews, of Lancaster, Ohio, 

 I am also indebted for the use of many of the specimens illustrating 

 the Maxville limestones. 



The fossils illustrated on Plate I, represent forms that are found ex- 

 clusively in the hydraulic cement beds of the State, 1 which represent 

 the lower part of the Lower Helderberg and Waterlime groups of New 

 York. The character of the fossils is such that no comments are 

 necessary in regard to the horizon they represent. Plates II to VI in- 

 clusive, contain figures of species from the limestones below the hori- 

 zon known as the "Bone bed" in the vicinity of Columbus, Ohio, and 

 are to a great extent illustrations of heretofore undescribed forms. The 

 forms represented on Plate VII are, with one exception, known species ; 

 they represent horizons not hitherto recognized within the limits of the 

 State, and require something more than a passing notice ; I have there- 



1 The beds of this horizon in Ohio are magnesian limestone, of the ordinary 

 type, and are burned into common lime, on the large scale. — E. O. 



