126 



AMPHIBIA 



CLASS II 



Hijlerpeton, Owen • and Brachydectes, Cope, all small and fragmentary 

 preserved. 



SeeUya, Fritsch. Larval, lizard-like forms under 2*5 cm. in length, with 

 rounded snout. Teeth smooth, simple, hollow, present on all bones of the 

 palate, those of the premaxillae much larger than the maxillary teeth. 



Parasphenoid a long slender bone ex- 

 panding behind into a rectangular plate. 

 Gill arches, and both dorsal and ventral 

 armour present. Scales elongated oval, 

 ornamented with undulating or dichotomis- 

 ing lines. Very rare in Lower Permian 

 of Niirschan, Bohemia. S. pusilla, Fritsch. 

 Bicnodon, Orthocosta, Microbrachis, Limner- 

 peton, Fritsch. Lower Permian ; Niirschan, 

 Bohemia. 



Tuditanus, Cocytinus, Colosteus, Lepto- 

 phrcCdus, Pleuroptyx, Cope. Coal Measures ; 

 Linton, Ohio. 



Lepterpeton, Huxley (Fig. 210). Lizard- 

 like, longicaudate, with narrow, elongated 

 head and tapering snout. Orbits midway 

 the length of the skull ; carpus and tarsus 

 cartilaginous. Hind-limb slightly stouter 

 than the anterior, 

 rhombic. Coal 

 Ireland. 



Keraterpeton, Huxley (Ceraterpetum, 

 Huxley). Salamander - like, with much 

 elongated tail ; total length upwards of 

 50 cm. Skull broad, rounded anteriorly, 

 orbits far forward, and external bones 

 sculptured. A pair of large, backwardly 

 directed horns firmly attached to the 

 postero-lateral cranial angles. Very small 

 ventral scutes, and no dorsal armour. 

 Coal Measures ; Kilkenny, Ireland, and 

 Linton, Ohio. 



Scincosaurus, Fritsch (Fig. 211). Skull 

 smaller in proportion to the body than in 

 Keraterpeton, with more numerous pre- 

 sacral vertebrae, and distinct ossifications in carpus and tarsus. Lower 

 Permian ; Bohemia. S. crassus, Fritsch. 



Urocordylus, Huxley and Wright (Oestocephalus, Ptyonius, Cope), (Fig. 212). 

 Body and tail elongate, total length about 50 cm. Fore-limb slightly less 

 developed than the hind, both pentadactyle. Skull depressed, triangular, 

 posteriorly truncate. Orbits forwardly situated. Tail nearly twice as long 

 as the trunk with the head. Caudal vertebrae about 80 in number, with 

 long neural and haemal spines, expanded and crenulated distally. Ventral 

 armour composed of upwards of 100 rows of scutes converging toward the 

 median line, in form elongated oval, fusiform or oat-shaped. Coal Measures ; 



Ventral scales elongated 

 Measures ; Kilkenny, 



Fig. 2iu. 



Lepterpeton dobbsii, Huxley. Carboniferous 

 Kilkenny, Ireland. 3/ 4 (after Huxley). 



