Chattanooga Shale in Kentucky, 133 



which existed for the collectors to confuse them are too evi- 

 dent to require discussion. If these genera occur in the Cleve- 

 land shale at Bedford, as Professor Newberry believed, recent 

 workers in this tield should have found at least one or two of 

 them. We have, however, the testimony* of two paleoiehthyol- 

 ogists, Dr. L. Hussakof and Prof. E. B. Branson, who have 

 been persistent collectors in the Cleveland shale of northern 

 Ohio, that they have never found any of these genera in it. 

 Professor Bransonf writes as follows : 



" I have never collected any specimens of the genera mentioned 

 in your letter, from the Cleveland shale, nor have I ever seen 



Carboniferous fish remains of any kind in the shales We 



had quite a large collection of Cleveland shale material in Oberlin 

 College Museum, but all of it indicated the Devonian age of the 

 formation." 



Dr. Hussakof indicates his experience in the following 

 words : 



"In regard to your query about Hnplonchus, Oroclus and 

 Polyrhizodus — I have never found any of them in the Cleveland 

 shale."! 



In view of this kind of testimony from paleontologists thor- 

 oughly familiar with the fish fauna of the Cleveland shale, 

 both through extended collecting and study of all the important 

 collections made by others, we seem forced to conclude that 

 the Carboniferous fishes which Newberry records from the 

 Cleveland shale came probably from the Sun bury instead of 

 the Cleveland. 



When Newberry's monograph on the Paleozoic fishes of 

 North America was published he was not aware that any of the 

 twenty-eight fossil fishes which had been described from the 

 Cleveland shale occurred in the Huron shale of northern Ohio, 

 for he states§ that " none of the fossil fishes described from 

 northern Ohio should be credited to the Huron." Progress 

 has been made since this was written in our knowledge of the 

 range of the Cleveland shale fishes. It has been comparatively 

 small, however, because the group of collectors who have made 

 the Cleveland shale famous for its fossil fishes, all lived on or 

 near outcrops of this formation and gave comparatively little 

 attention to the more remote area in northern Ohio in which 

 the Huron shale reaches the surface. Branson || has, however, 

 shown that at least one of the Cleveland shale fishes, Dinich- 

 thys intermedins, occurs in the Huron shale in its typical area 

 near Huron, Ohio. It may be pointed out, too, that one at 



* Letters to the writer. 



f Letter to the writer, Nov. 23, 1911. 



X Letter to the writer, Nov. 11, 1911. 



§ Mon. U. S. Geol. Survey, xvi p. 127, 1889. 



I Science, n. s., vol. xxviii, p. 94, 1908. 



