170 LABYRINTHODONT1A. 



in the ' Trans. Roy. Irish Academy,' vol. xxiv. pi. xxviii. 

 fig. 1, and do not appear to be of an ernbolomerous type. 



Purchased, 1870. 



41851 k. Fragment of shale containing traces of the anterior part 

 of a skeleton apparently referable to this form ; from 

 Jarrow. Purchased. 1870. 



Family DENDRERPETIDjE \ 



Imperfectly known. Skull large and tending more or less to a 

 parabolic form ; the parasphenoid with a short stem, and rough and 

 expanded body. Teeth smooth at the summit, but deeply grooved 

 at the base, with simple and irregular plications o the dentine. 

 According to Dawson the vertebral centra are discoidal. 



Genus DENDRERPETUM, Owen 2 . 



The type genus. Skull of an ovoid or subparabolic contour, with 

 the orbits placed in the middle of the length or posteriorly, the 

 nares very minute, the nasals large and expanded anteriorly, and 

 the muzzle rounded. 



Dendrerpetum pyriticum, Fritsch 3 . 



Length of skull about 0,065 in middle line, its length exceeding 

 the width ; orbits in middle of length. 

 Hob. Europe (Bohemia). 



R. 1448. Electrotype from a fragment of shale, showing the ventral 

 aspect of the cranium. The original, which is the type, 

 was obtained from the Gaskohle (Lowest Permian) of 

 Nyran (Pilsen); and is figured by Fritsch in his 'Fauna 

 der Gaskohle/ vol. ii. pi. xlix. fig. 1. Purchased, 1888. 



Dendrerpetum (?) deprivatum, Fritsch 4 . 

 Length of skull about 0,045 in middle line ; skull longer and 



1 = Dendrerpetontida, Fritsch. 



2 Quart. Journ. Geol. Soc. vol. ix. p. 64 (1853). — Amended from Dendr- 

 erpeton. 



3 Fauna der Gaskohle, vol. i. pt. i. p. 28 (1879). 

 * Ibid. vol. ii. pt. i. p. 9 (1885). 



