HISTORY OF CLASSIFICATION OF AMPHIBIA. 45 



Hay's Catalogue. of Fossil Vertebrata of North America contains the next scheme 

 for the classification of the Amphibia which pays especial attention to the extinct 

 forms. His classification is as follows: 



Class BATRACHIA Macartney, 1802. 

 Order Stegocephali Cope, 1868. 



Suborder Microsauria Dawson, 1863. 

 Family Protritonida Lydekker, 1889. 



Genera: Amphibamus Cope, Pelion Wym. 

 Family Molgophida Cope, 1875. 



Genera: Phlegethontia Cope, Molgophis Cope. 

 Family Hylonomida Fritsch, 1883. 



Genera: Hylonomus Dawson, Smilerpeton Dawson, Hylerpeton Oven, Fritschia 



Dawson ; Brachydectes Cope. 

 Family Ptyoniida Cope, 1875. 



Genera: Keraterpeton Huxley, (Estocephalus Cope, Ptyonius Cope, Ctenerpeton 



Cope. 

 Family Tuditanida Cope, 1875. 



Genera: Tuditanus Cope, Cocytinus Cope. 

 Family Diplocaulidce Cope, 1881. 

 Genus: Diplocaulus Cope. 



Lepospondylous Genera of uncertain position: Amblyodon Dawson, Hyphasma 

 Cope, Eurythorax Cope, Thyrsidium Cope, Pleuroptyx Cope, Cercario- 

 morphus Cope. 

 Suborder Apoecospondyli Hay, 1902. 



Family Deitdrerpetontida Fritsch, 1889. 



Genera: Dendrerpeton Owen, Baphetes Owen, Platystegos Dawson. 

 Family Sauropleurida Hay, 1902. 



Genera: Sauropleura Cope, Leptophractus Cope. 

 Family Archegosaurida. 



Genera: T rimer orhachis Cope, Dissorophus Cope. 

 Family Cricotida Cope, 1884. 



Genera: Cricotus Cope. 

 Family Anthracosanridce. 



Genus: Eosaurus Marsh. 

 Family Eryopid<e Cope, 1882. 



Genera: Eryops Cope, Ichthycanthus Cope, Zatrachys Cope, Anisodexis Cope, 



Acheloma Cope. 

 Family Mastodon saurida Huxley, 1863. 



Genera : Mastodonsaurus Jaesjer, Eupelor Cope, Pariostegus Cope, Dictyocephalus 



Leidy. 

 Order Urodela. 



Genera: Scapherpelon Cope, Hemitrypus Cope. 

 Order Salientia Laurenti, 1768. 

 Family Ranida. 



Genera: Rana Linne, Eobatrachus Marsh. 



This classification given by Hay is only for the forms which occur in North 

 America. 



