MEMOIRS 



OF THE 



CAENEGIE MUSEUM. 



VOL. VI. 



NO. 6. 



CATALOG OF THE FOSSIL FISHES IN THE CARNEGIE MUSEUM. 

 PART III. CATALOG OF FOSSIL FISHES FROM THE LITHOGRAPHIC 



STONE OF CERIN, FRANCE. 



By C. R. Eastman. 



(Plates XLVIII-LVI.) 



The subject matter of the following Catalog consists of a large and representa- 

 tive assortment of Upper Jurassic fishes from Cerin (Ain) in southeastern France, 

 the material being contained in the Bayet Collection, which was acquired by the 

 Museum through the generosity of Mr. Andrew Carnegie in 1903. 



It is now generally considered that the deposits of lithographic limestone in 

 the Department of Ain, France, and in the vicinity of Solenhofen, Bavaria, are of 

 contemporary age, both being referable to the Lower Kimmeridgian division of the 

 marine Upper Jura, and not to the Corallian (upper member of the Middle Jura), 

 as some writers have supposed. The stratigraphic relations of the fish-bearing 

 beds at Cerin will be clear from an inspection of the annexed diagram showing 

 the geological section across this region. 



Essentially the same ichthyic fauna is represented in the lithographic stone 

 of Cerin, France, and in similar deposits of the general region around Solenhofen, 

 Bavaria; the latter locality, however, furnishing the more abundant and more 

 diversified forms of animal life. The composition of the fish-fauna is essentially 

 " ganoid "; that is to say, teleost fishes of the Crossopterygian and Actinopterygian 

 orders predominate, cartilaginous forms are in the minority, and the Dipnoan 

 sub-class is without known representatives. Among Elasmobranch fishes the 

 Batoidei, or rays, outnumber the sharks, and Holocephali occur very sparsely 



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