THE DAWN OF QUADRUPEDS 



563 



later Sir J. W. Dawson and Sir 

 Charles Lyell in breaking apart one 

 of the stumps of the Large Sigillariae 



came across sonic interesting verte- 

 brate remains. When the announce- 

 ment of this discovery was given 

 to the Geological Society of London, 

 the president or secretary remem- 

 bered a skull which Dawson had 

 sent in three years previously and 

 which had lain in the collection of 

 the society all of this time. Dawson 

 had been delayed one day at Al- 

 bion, Xova Scotia, and in order to 

 while away the time between trains m c/ . . 



1 J Fig. 2. The Type of Stepops divaricata 



looked over a pile of rubbish from cope from the carboniferovs of Ohio. 



a COal mine near by. In SO doing In the collection of the University of Chi- 



J cago. Natural size. 



he split open a large slab of shale 



in which he found a nearly perfect skull of some unknown animal which 

 he thought might be a fish. This he sent to the Geological Society with 



other specimens, and it was de- 

 scribed in 1853 by Sir Richard 

 Owen as ' Baphetes planiceps, 

 and its relationships were 

 shown to be with the Am- 

 phibia. There have been but 

 few remains discovered since 

 at this locality, although it 

 was frequently examined by 

 TDawson. 



For many years after 1853, 

 Dawson continued his re- 

 searches into the Amphibia 

 of the Joggins section in Xova 

 Scotia, and he has left us a 

 great amount of knowledge 

 which he collected into his 

 " Acadian Geology " and into 

 his " Air-Breathers of the 

 Coal Period.'" The forms de- 

 scribed by Dawson differed in 

 an essential respect from those 

 discovered in the United States. -The animals whose remains occur in 

 the hollow sigillarian stumps in the Joggins deposits, seem to have all 



Fig. 3. The Specimen of Amphibamusgrandi- 

 ceps Cope from the Mazon Crkek Beds of Illi- 

 nois. In the collection of Mr L. E. Daniels of La 

 Porte, Indiana. Natural size. 



