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 Protritonidce Lydekker, 1889. 



Genera: Amphibatims Cope, Pelion Wym. 

 Family Molgophida Cope, 1875. 



G'enera: Phlegethontia Cope, Molgophis Cope. 

 Family Hylonomidee Fritsch, 1883. 



G'enera: Hylonomits Dawson, Smilerpeton Dawson, Hylerfeton Owen, Frilschia 



Dawson; Brachydectcs Cope. 

 Family Piyoniidas Cope, 1875. 



Genera: Keraterpeton Huxley, CEstocephalus Cope, Ptyonius Cope, Ctenerpelon 



Cope. 

 Family Tuditanida Cope, 1875. 



Genera: Tuditanus Cope, Cocytinus Cope. 

 Family Diplocaitlidee Cope, 1881. 

 Genus: Diplocaulns Cope. 



Lepospondylous Genera of uncertain position: Amblyodon Dawson, Hyphasma 

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

 morphns Cope. 

 Suborder Apoecospondyli Hay, 1902. 



Family Dendrerpetontida Fritsch, 1889. 



G'enera: Dendrerpcton Owen, Baphetcs Owen, Plalysiegos Dawson. 

 Family Sauropleuridce Hay, 1902. 



Genera: Sauropleuia Cope, Leptophractus Cope. 

 Family Archegosaurid<B. 



Genera: Trimerorhachis Cope, Dissorophus Cope. 

 Family Cricotida; Cope, 1884. 



Genera: Cricotus Cope. 

 Family Anihracosauridce . 



Genus: Eosaitnts Marsh. 

 Family Eryopidce Cope, 1882. 



G'enera: Eryops Cope, Ichihycanthus Cope, Zatrachys Cope, Anisodexis Cope, 



Acheloma Cope. 

 Family Mastodonsauridee Huxley, 1863. 



Genera: Mastodonsaums Jaeger, Eupelor Cope, Pariostcgus Cope, Dictyocephalus 



Leidy. 

 Order Urodela. 



Genera: Scapherpeton Cope, Hemitrypus Cope. 

 Order Salientia Lauren ti, 1768. 

 Family Ranidce. 



Genera: Rana Linne, Eobatrachus Marsh. 



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

 America. 



