HISTORY OF CLASSIFICATION OF AMPHIBIA. 4! 



rocks of Nova Scotia. Two years later Cope proposed the new order Xenorhachia 

 (105) for the reception of the form A>nf>liibums grdndiceps from the Coal Measures 

 of Illinois. He gave as the characters of this order cartilaginous vertebrae and the 

 absence of ribs. 



In 1866 Owen proposed (516) the most elaborate and comprehensive scheme of 

 classification which had thus far been offered. His classification is as follows: 



Subclass DIPNOA. 



Order Ganocephala (extinct). Genera: Archegosaurus, Dendrerpeton, etc. 

 Order Labyrinthodontia. Genera: Labyrinthodon, Rhombopholis , etc. 

 Order Batrachia. 



Suborder Ophiomorpha. Family: Ccecilidae. 

 Suborder Ichthyomorpha. Family: Proteidas, Salamandridse. 

 Suborder Theriomorpha (Anura). 

 Family i. Aglossa. 

 Family 2. Ranida. 

 Family 3. Hylida;. 

 Family 4. Bufonidce. 



Haeckel the same year proposed (312) an entirely different scheme of classifica- 

 tion and in some respects more acceptable than Owen's. Haeckel's classification 

 is as follows: 



Class AMPHIBIA. 



Subclass I. Phractamphibia. 

 Ordnung i. Ganocephala. 



Genera: Archegosaurus, Dendrerpeton, Raniceps 

 Ordnung 2. Labyrinthodonta. 



Genera: Baphetes, Zygosanrus, Mastodonsaurus, Trematosaurus, Capitosaurus. 

 Ordnung 3. Peromela. 

 Subclass II. Lissamphibia. 



Ordnung i. Socobranchia. 



Genera: Siren, Proteus, Menobranchus, etc. 

 Ordnung 2. Sozura (Caudata). 



Genera: Cryptobranchus, Triton, Salamandra. 

 Ordnung 3. Anura (Ecaudata). 



Families: Aglossa, Bufonidas, Ranida:. 



This classification is further elaborated in the edition of 1895. 

 Cope in 1868 proposed (no) the scheme of classification which was in use for 

 some time, although it has since suffered some change. His classification follows: 



BATRACHIA. 



Order i. Trachystoma. 

 Order 2. Proteida. 

 Order 3. Urodela. 

 Order 4. Gymnophiona. 

 Order 5. Stegocephali. 



Suborder Xenorhachia. 



Amphibamus grandiceps Cope. 

 Suborder Microsauria. 



Genera: Pelwn Wyman, Hylonomus Dawson, Pariostegus Cope, Dendrerpeton 

 Owen, Hvlerpeton Owen, Brachydectes Cope, Sauropleura Cope, CEsto- 

 ccphalus Cope, Molgophis Cope. 

 Suborder Labyrinthodontia. 



Genera: Dictyocephalus Leidy, Centemodon Lea, Baphetes Owen, Eupelor Cope. 



