Animals Before Man 



papers on fossil vertebrates was a description 

 of these vertebrae, to whicli lie gave the name 

 of Eosauriis acadianus (the early Acadian * 

 reptile). 



These early amphibians are without living 

 representatives, and belong to a group which 



has been termed Stego- 

 cephala, roof-headed, or 

 Labyi'inthodonta, laby- 

 rinth-toothed. The first 

 of these names refers 

 to the manner in which 

 the head is roofed over 

 by bone, as in sea-tur- 

 tles, while the other 

 was given in reference 

 to the curious and com- 

 plicated foldings of the 

 enamel, although this 

 can only be seen when a thin section is viewed 

 with the microscope. The skull of a sea-turtle 

 appears quite solidly made if looked at from 



Skull of Eryops, a stegoceph- 

 alan from the Permian 

 of Texas. Much reduced. 

 (After Cope.) 



* South Joggins is in that part of Nova Scotia known as Aca- 

 dia and rendered famous by Longfellow as well as by its fossils. 



118 



