Manchester Meuwirs, Vol. ivii. (191 2), No. |. 



I. The larger Coal Measure Amphibia. 

 By D. M. S. Watson, M.Sc. 



(Received and read October islh, i()i2.) 



The large Stegocephalia of the Coal Measures and 

 Lower Carboniferous, although of ver}' great interest, 

 have never been satisfactoril}' described, and the present 

 partial description of some of the material in the New- 

 castle Museum is to be regarded as a preliminary sketch, 

 to be followed by a more full\' illustrated memoir dealing 

 with all the available material. 



The material at Newcastle includes five more or less 

 complete skulls oV^ Loxojniiia Allina^n" : and separate: — 

 premaxillae, maxillae, lachrymal, supratemporal, frontal 

 pre-vomer and palatine bones, one complete and seven 

 incomplete rami of the lower jaw, including separate 

 dentary and splenial elements, of the same form, which is 

 probably not even generically identical with Huxley's 

 type of the species. 



The form described by Atthe\' as ^' Ant/iracosamjus 

 RussclW is represented by one complete skull and 

 separate premaxillary, maxillary, nasal, pre-vomer, and 

 palatine bones, and separate portions of skulls consisting 

 of frontals, post-frontals, parietals, post-parietals, tabulares, 

 supratemporals, and basisphenoid, parasphenoid, exoccip- 

 ital, prootic and opisthotic, respectively. There are also 

 two complete rami of the lower jaw and some other frag- 

 ments. This type is very different from the original tj'pe 

 of the species, and I intend to refer to it as Pteroplax. 



In addition to the skulls there are very many verte- 

 brae, ribs, clavicular elements, etc., which cannot generally 

 be identified. 



December 12th, igi2. 



