SUPPLEMENT 



TO THE DESCRIPTIONS OF VERTEBRATES. 

 BY PROF. EDWARD D. COPE. 



Class REPTILIA. 



Sub-class BATRACHIA. 



Order XENORHACHIA. 



Genus AMPHIBAMUS, Cope. 



Aaiphibamus grandiceps, Gope. 



PI. 32, fig. 8, and cut on p. 136. 

 Amphibamus grandiceps, Cope, (Proc. Acad. Nat. Sci., Philad., 1865, p. 134.) 



The recent additions to our knowledge of the air-breathing vertebrates of 

 the Carboniferous period, are of great interest to the comparative anatomist, as 

 furnishing new points in the series of structures between the Ganoidea and 

 Lacertilia, or new "generalized" types combining the structures of these and 

 of the Batrachia. 



Note. — A single specimen of the Batrachian here described is in possession of Mr. 

 Joseph Even, who has kindly placed it temporarily at the service of the Survey. It 

 was discovered by him near Morris, Grundy county, Illinois, in a bed belonging appa- 

 rently above the middle of the Coal Measures. It is imbedded in a concretion of brown 

 ironstone. The cavities left by the bones are occupied by a white friable mineral, 

 which has probably percolated into them. — A. H. W. 



