122 



THE AMERICAN NATURALIST [Vol. XLIII 



t lu- 



eludes that: '-This character a. his another evidence ot the rela- 

 tionship between the Proeolophonia and Labidosaurns. and de- 

 stroys its value as a group distinction." Broili, on the other 

 hand, sees closer relationship between the Cotylosauria and the 

 Stegocephala. 



The Oldest Known Reptile. 1 — ! 



redescribed the type speciniet 

 This form, which Williston pre 

 nov., was doubtfully referred t 

 but subsequently he referred i 

 It certainly does not belong in 



S. YY. Wi 



the Linton mines of Ohio which have furr 

 the remains of Carboniferous quadrupeds 3 

 America. The Linton mines were undou 

 down in the Pennsylvanian and there has no 

 a reptile from a lower horizon. The affinit 

 doubtful though its close relationship to the 

 established. The intercentral attachment < 



Docentra in Isodectes copei, may require 

 of the formation of the reptilian verte- 

 hdoniinal ribs in this form is significant 

 it discissions of the relationships of the 



The Age of the Gaskohle.— Students of vertebrates the world 



;ith some surprise, though not a little gratification, to note that 

 hrough the recent studies of European geologists and paleon- 

 ologists the deposits in Bohemia are now being regarded as 

 Ipper Carboniferous. The facts and arguments are well set 

 orth by Broili 1 in a recent discussion on Sclerocephalus. Be- 

 ides thus adding to the stratification of the forms of Amphibia 

 he new fact is thus brought out that the large form Sclero- 



