170 ME. D. M. S, WATSON ON 



Family Branchiosaurid^ Fritscli. 



With the characters of the super-order. 



Branchiosaurus Fritsch. Upper Coal Measures and Lower 

 Permian, Bohemia, Germany, and France. 



Micrerpeton Moodie. Coal Measures, Illinois. 

 Melanerpeton Fritsch. L. Permian, Bohemia and Saxony. 

 Pelosaurus Credner. „ . Saxony and France. 



■? Dawsoiiia Fritsch. „ Bohemia. 



Super-Order LEPOSPONDYLIA Zittel. 



Small Batrachia with a roofed skull and lepospondylons 

 vertebrse. 



Yery few members of the super-order are at all completely 

 known, and these differ in many respects. In the structure of 

 the skull and lower jaw Batracliiderpeton and Dijilocaulus show 

 clear i^esemblances to the Labyrinthodontia, perhaps only owing 

 to a common descent from Crossopterygian fish. 



Family ISTectridia Miall. 



Lepospondyli with the posterior corners of the skull produced. 

 Two occipital condyles. Palate with a small parasphenoid and 

 small vacuities. Tail with long neural and haemal spines, ex- 

 panded and fluted at the ends. Accessory articulating facettes 

 between the vertebrae. 



Keraterpeton Hux. Coal Measures, Ireland and England. 



Urocordylus Hux. ,, ,, ,, 



Batracliiderpeton Hancock & Atthey. Coal Measures, England. 



"^ Scincosaurus Fritsch. L. Permian, Bohemia. 



? Oestocephahcs Cope. Coal Measures, Ohio. 



? Pti/onius Go^pe. ., ,, 



'! Sauravus Thevenin. U. Coal Measures, France. 



? Diceratosaiorus Jaekel. Coal Measures, Ohio. 



? Crossoielos Case. L. Permian, Oklahoma. 



Family Diplocaulid^ 



Lepospondyli with enormously produced corners of the skull. 

 Palate with a large parasphenoid and moderate-sized vacuities. 

 Tail long, with well interlocked vertebrye. 



Diplocaulus Cope. L. Permian, Texas ; U. Carboniferous, 

 Illinois. 



Family A isxoPODiDiE. 



Legless Lepospondyls. 



DoUchosoma Hux. U. Carboniferous, Ireland ; and other 

 forms not necessarily closely connected. 



Batrachia incerta sedis. 



Lysorojyhus (primitive Urodele ?) ; Cardiocephalas, 

 G-r/mnarthrus, etc. 



