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BULLETIN OF THE LABORATORIES 
6 . The Cleveland shale. 
This is a local bitumenous phase of great interest on account of 
the fish remains found in it. It may be omitted from our discussion 
as a local development reaching only the thickness of fifty feet and 
rapidly thinning out to the south. But that fact, and the fact that the 
Erie also becomes thicker to the north-east while the remaining strata 
grow thicker toward the south-west may occur to us in the light of a 
valuable suggestion. Meanwhile we pass to 
7. The Erie shale. 
This has heen a bone of contention. Probably the Devonian 
content of the lower Waverly would be admitted by everyone were it 
not that the fauna of the Erie is undoubtedly Portage or Chemung. 
It has yielded us, in the Cuyahoga valley near Peninsuala, the follow- 
ing species : 
1. Spirifer alfi/s. 
2. Spirifer disjunctus. 
3. Spirifer prcematurus. 
4. Leiorhynchus niesacostalis. 
5. Streptorhynchiis chemungensis. 
6 . Terebraiida^ sp. 
7. Rhynchonella sappho. 
8. Leiopteria., sp. 
9. Orthoceras bebiyx. 
10. Productus (like lachrymosus.) 
* To this list Prof. Newberry adds Orthis tioga, and others of un- 
mistakable Chemung age. Dr. Newberry, in a private letter dated 
May 28th, 1888, reiterates the conclusions arrived at on the Geolog- 
ical Survey of Ohio, stating that ‘‘there is no foundation in fact for 
the union of the Cleveland, Erie, and Huron shales as the Ohio Black 
Shale. The Cleveland and Huron have nothing in common and in 
eastern Ohio are separated by 1000 feet of Erie shale which is upper 
Portage and Chemung. It (the Huron) represents everything in New 
York, from the Gardeau shale to the Marcellus inclusive, as I have 
taken from it in central and western Ohio fossils of the Portage, the 
Genessee, and the Marcellus shales, viz : Goniatites coniplanatus ^ 
Leiorhynchus quadricostatus., Lingula spatulata., Discina lodensis, Lunu- 
licardium fragile., Slvliola fissurella, and Leiorhynchus limitarisi^ 
The aspect of the Erie shale is exactly that of the Waverly shale 
