pi 



AMERICAN 



JOUENAL OF SCIENCE AID AETS. 



[SECOND SERIES.} 



Art. I. — Description of ike Remains of a new Enaliosaurian 

 {Eosaurus Acadianus\ from the Coal Formation of Nova Scotia; 

 by O. C. Marsh, B.A., of the Sheffield Scientific School, 

 Yale College.— With Plates. 



[CommuDicated to the Geological Society of London, May, 1862.] 



The Keptilian remains from the Coal-measures, hitherto de- 

 scribed, are few in number, and have nearly all been regarded 



as Batrachian, or Amphibian, Previous to the year 1844, the 



existence of even this low form of reptilian 1" 



boniferous period was unsuspected by most geologic 



first appearance upon the earth confidently referred to the Per- 



^ form of reptilian life during the Car- 

 spected by most geologists, and its 



epoch. In that year Hermann von Meyer announced the 

 aiscovery in the Rhenish Bavarian Coal-measures of a reptile 

 allied to the Salamanders, which he described under the name 

 Apateon pedestris ;* and about the same time Dr. King published 

 an account of the footprints of a large Batraehian, which he had 

 observed in the coal strata at Greensburg^ Penn.f In 1852 Sir 

 Charles Lyell and Prof J. W. Dawson obtained in the Coal- 

 measures of Kova Scotia the bones of the Dendrerpeton Acadia- 

 num (Wyman and Owen), which were the first reptilian osseous 

 remains described from the Carboniferous rocks of America.^ 



* Leonhard und BronB, Neues Jahrbuchfur Mineralofjie, etc., 1844. page 336. 

 f Description of fossil footmarks (of Thenar opus heterodactyluvi) found in the 



Am. Journal of Science, vol. xlviii, pape 343. Also in voL'i, new series, pa|e 268.' 

 X Ou the remains of a reptile [Dendrerpeton Acadianum, Wyman and Owen), 

 and of a land shell discovered in the interior of an erect fossil tree in the Coal- 

 measures of Nova Scotia; by Sir Charles Lyell, F.R.S., Ac, and J. W. Dawson, 

 Esq. Quarterly Journal of the Geological Society, London, May, 1853, vol. ix, p. 53! 

 Am. Jctcb. Sci.— Second Series, Vol. XXXIY, No. 100.— Jllt, 1863. 



