FAUNA — LOWER KEUPER SANDSTONE. 21 



Smith. Woodward, " to distinguish the Triassic ancestors 

 " of the Crocodilia from those of the Rhyiieocephalia and 

 " Dinosauria."* Of Stagonolepis, the subject of Huxley's 

 well-known paper, t the extremities are too little known 

 to warrant our speculating on its presence here. Mr. E. 

 T. Newton, E.R.S., has described an allied genus, Erpeto- 

 suchus,+ from Elgin, and though the extremities are pre- 

 sent they are so imperfectly preserved that it would be 

 unwise to try to match them with any of our footprints ; 

 the few and weakly marked bones of the digit we have 

 may have been so covered with flesh as to give the foot a 

 form more or less differing from that of the bony 

 skeleton. 



Another form also described by Mr. Newton in the 

 same paper, " Ornithosuchus woodwardii," presents so 

 many points of resemblance to both the Parasuchia and 

 the Dinosauria that it is evidently with great hesitation 

 that he at last places it provisionally with the latter. The 

 bones of the left hind foot, though not in position, are all 

 well preserved, so that it may be possible to restore the 

 foot and search for its impression. The remains which 

 are the subject of the paper, and also of the Dicynodonts, 

 &c, referred to earlier, are all in the Geological Survey 

 Museum, Jermyn Street, London, and I must express my 

 thanks to Mr. Newton for the ready assistance he* has so 

 kindly rendered me whenever I have referred to him. 



In his paper on Stagonolepis and the Evolution of 

 the Crocodilia, § Professor Huxley in 1875 remarked on 



* Outlines of Vertebrate Palaeontology, p. 216 (1898). 



f Quart. Jour. Geological Socy., vol. xxxi., p. 423. 



I Eeptiles from the Elgin Sandstone, description of two New Genera. 

 Phil. Trans. Royal Soc, vol. 185 B., p. 574 (1894). 



§ Quart. Jour., Geological Socy., vol. xxxi., p. 424. 



