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 ProtritonidcB Lydekker, 1889. 



Genera: Amphibamus Cope, Pelion WjTn. 

 Family Molgophidm Cope, 1875. 



Genera: Phlegethontia Cope, Molgophis Cope. 

 Family Hylonomidce Fritsch, 1883. 



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

 Dawson; Brachydectes Cope. 

 Family PtyoniidcB Cope, 1875. 



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

 Cope. 

 Family Tttditanida Cope, 1875. 



Genera: Tuditanus Cope, Cocytinus Cope. 

 'FamWy Diplocaulid(B Co^e, 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 Dendrerpetontida Fritsch, 1889. 



Genera: Deiidrerpeton Owen, Baphetes Owen, Platystegos Dawson. 

 Family Sauropleurida Hay, 1902. 



Genera: Sauropleuta Cope, Leptophractus Cope. 

 Family ArchegosaurtdtE. 



Genera: Trimerorhachis Cope, Dissorophus Cope. 

 Family Cricotidce Cope, 1884. 



Genera: Cricotus Cope. 

 Family Anthracosaurida; . 



Genus: Eosaurus Marsh. 

 Family EryopidcE Cope, 1882. 



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

 Achelonta Cope. 

 Family MastodonsauridcE Huxley, 1863. 



Genera: Mastodonsaurus Jaee:er, Eupelor Cope, Pariostegus Cope, Dictyocephalus 

 Leidy. 

 Order Urodela. 



Genera : Scapherpeton Cope, Hemitrypus Cope. 

 Order Salientia Laurenti, 1768. 

 Family Ranidw. 



Genera : Rana Linne, Eobatrachus Marsh. 



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

 America. 



