LUfNEEPETID^: . 199 



Family Uxceetain. 



Genus LEPTERPETUM, Huxley \ 



Tail long. Skull long and triangular, with the orbits in the 

 middle of the length ; mandibular symphysis elongated. Thoracic 

 buckler unknown : ventral scutes long and rhomboidal. Ribs thin 

 and curved. Caudal vertebras with long chevrons, about 25 in 

 number. Carpus and tarsus unossified. 



Lepterpetum, sp. 



The following specimen indicates an individual of larger size than 

 the type specimen of the typical L. dobbsi, Huxley 2 (which measures 

 6 inches in length), but there is not sufficient evidence to show 

 whether it is specifically distinct. 



Hah. Europe (Ireland). 



41851. Slab of shale showing an imperfect skeleton apparently 

 referable to a member of this genus ; from the Coal- 

 Measures (Upper Carboniferous) of Jarrow Colliery, Kil- 

 kenny. The length of the vertebral centra in the dorsal 

 region is 0,060. Purchased, 1870. 



Lepterpetum (?), sp. 



The undermentioned specimen has been provisionally referred by 

 Fritsch to this genus. 

 Hah. Europe (Bohemia). 



E. 374 a. Electrotype from a fragment of shale, showing portions of 

 the skull. The original was obtained from the Gaskohle 

 (Lowest Permian) of JNyfan (Pilsen), and is described and 

 figured by Eritsch in his ' Eauna der Gaskohle,' vol. i. 

 p. 172, pi. xli. fig. 10. Purchased, 1882. 



Family LIMNERPETID^E. 



Body longer and tail shorter than in the preceding family, the 

 skull being broad and frog-like, with smooth bones ; the neural 

 spines and chevrons of the caudal vertebras simple, and caudal ribs 

 present. Teeth small, with their summits either smooth or grooved, 

 and the pulp-cavity large. Ventral scutes sculptured ; no dorsal 

 armour. 



1 Trans. Koy. Irish Academy, vol. xxiv. p. 362 (1867). — Lepierpeton. 



2 Loc. cif. 



