12 AMPHIBIA AND PISCES OF THE PERMIAN OF NORTH AMERICA 



The same year he described a collection of fossils found in northern Okla- 

 homa (15). There were reported from this locality: 



Pisces. 



Elasmohranchii. 



Diacranodus {Pleuracanthus) compressus Cope. 

 Dipnoi. 



Sagenodiis (?) sp. 



Diplocaulus viagnicornis, D. limbatus, D. salamandroides. 



Trimerorhachis leptorhynchus sp. nov. 



Cricotus sp. 



Cricotillus brachydens gen. et sp. nov. 



Eryops megacephalus. 



Crossotelos annulatus gen. et sp. nov. 



In 1904 Broili published his paper on Permian reptiles and Amphibians 

 of Texas in the "Paleontographica" (5). Several new forms were described 

 as listed below: 



Order Stegocephali. 



Suborder Lepospondyli. 

 Family Diplocaulidcs. 

 Genus Diplocaulus. 

 D. copei nov. 

 D. pusillus nov. 

 Suborder Temnospondyli. 

 Genus Cncotus. 



Trimerorhachis. 

 Eryops. 

 Zatrachys. 

 Acheloma. 

 Anisodexis. 

 Dissorophus. 

 Aspidosaurus nov. 

 A. chiton nov. 

 Cardiocephalus nov. 

 C. sternbergi nov. 



Lysorophus and Otoccelus are regarded as reptiles. The first is placed in a 

 new family Paterosauridce and regarded provisionally as Rhyncocephalian. 



Later in the same year (6) a second paper by Broili elaborated the idea 

 of the fundamental position of Lysorophus and suggested that there must be a 

 diphyletic origin of the Reptilia, one branch passing back through the Cotylo- 

 sauria to the Stegocephalia and another through the Paierosaurida to the fish. 



Another paper (7) describes the skull of the Permian shark, to which Broili 

 gives Garman's name Diacranodus. The species platypternus is regarded as a 

 synonym of D. texensis. 



In 1907 Case described as Zatrachys apicalis a fossil from Texas (16). 

 And the next year he gave an account of the skull of Lysorophus, referring 

 the genus to the Amphibia (17). This paper was answered by Broili (8) 

 who reasserted the reptilian character of Lysorophus, but he now regarded it 



