214 LABYRINTHODONTIA. 



R. 342. Electrotypes from two fragments of shale, exhibiting portions 

 of the skull. Originals figured, op. cit. pi. xi. figs. 3, 5. 



R. 341. Electrotype from a fragment of shale, showing the middle 

 thoracic plate. Original figured, op. cit. pi. xi. fig. 13. 



SuBORDINAL POSITION UNCERTAIN. 



It is impossible to assign the following forms to any definite serial 

 position, even if the whole of them are rightly referred to the Laby- 

 rinthodontia. 



Anthracerpetum crassosteum, Owen 1 . 



Known by fragments of teeth, and craoial and other bones. 

 Hab. Europe (Wales). 



R. 674. Four fragments of rock with imperfect bones ; from the 

 {Fig.) Coal-Measures of Llantrissent, Glamorganshire. The types; 



figured by Owen in the ' Geol. Mag.' decad. i. vol. ii. pi. i. 



figs. 1-4. Presented by J. E. Lee, Esq., 1885. 



Lepidotosaurus duffi, Hancock & Howse 2 . 



Known by the undermentioned specimen, which indicates a 

 reptile of the approximate size of Sphenospcndylus ; it is stated in 

 the 'Eep. Brit. Assoc' for 1874, p. 187, that the evidence for 

 referring this form to the Labyrinthodontia is insufficient. 



Hab. Europe (England). 



R. 723. One half of a split slab, showing part of the thoracic region 

 in a badly preserved condition ; from the Marl-slate (Mid- 

 dle Permian) of Midridge, Durham. This specimen is the 

 counterpart of the type slab figured in the ' Quart. Journ. 

 Geol. Soc' vol. xxvi. pi. xxxviii. 



Presented by W. C. Stobart, Esq., 1886. 



Genus non det. 



Known only by the undermentioned specimen, which indicates a 

 form about one-third the size of Eryops megacephalus. 

 Hab. Tasmania. 



R. 500. Cast of a femur ; from strata of unknown age in Tasmania. 

 The contour of the distal half approximates to that of the 

 femur of Eryops figured by Cope in the ' Proc. Amer. 

 Phil. Soc' vol. xix. pi. iv. The length of the specimen is 

 0,065. Presented by Sir R. Owen, K.C.B., 1884. 



1 Geol. Mag. decad. i. vol. ii. p. 6 (1865). —Anthrakerpeton. 



2 Quart. Journ. Geol. Soe. vol. xxvi. p. 557 (1870). 



