240 PERMIAN FOSSILS. 



PALiEOSAUKtrs PLATYODON, RiUy and Stutch. Owen, Eleventh Report Brit. Assoc, 



p. 154, 1842. 



— — „ Morris, Catalogue, p. 209, 1843. 



— — „ De Verneuil, Bull. Soc. Geol. de France, 



2"" serie, vol. i, p. 42, 1844. 



— — „ Geol. Russ., vol. i, p. 226, 1845. 



— — „ Tennant, Strat. List, p. 89, 1847. 



" In the formation which contained the jaw and teeth of the Thecodontosaurus, two 

 other teeth were separately discovered, differing from the preceding and from each 

 other ; the crown of one of these teeth measuring nine lines in length and five lines 

 in breadth. It is compressed, pointed, with opposite trenchant and serrated margins ; 

 but its breadth, as compared with its length, is so much greater than in the Theco- 

 dontosaurus, that Dr. Riley and Mr. Stutchbury have founded upon it the genus 

 PalcBosaurus, and distinguished it by the specific name of platydonr (Owen, Op. cit.) 



Pal^egsaurus cylindrodon, Miley and Stutchbury. 



Saueian, Williams. Proc. Geol. Soc, vol. ii, p. 112, 1834. 



PaLjEOSaukxjs cylindrodon, Uiley and Stutch. Proc. Geol. Soc, vol. ii, p. 398, 1836. 



— — „ Sixth Report Brit. Assoc, Trans. Sec, 



p. 92, 1837. 



— „ Trans. Geol. Soc, 2d series, vol. v, 



p. 352, pi. xxix, fig. 4, 1837. 



— Phillips, Lardner' s Cyc ., Geology, vol. i, 



p. 190, 1837. 



— — „ Owen, Eleventh Report Brit. Assoc, 



p. 154, 1842. 



— „ Morris, Catalogue, p. 209, 1843. 



— — „ De Verneuil, Bull. Soc. Geol. de France, 



2"= serie, vol. i, p. 42, 1844. 



— — „ Geol. Russ., vol. i, p. 228, 1845. 



— — „ Tennant, Strat. List, p. 89, 1847. 



The species has been founded on the second tooth noticed under Falaosaurtis 

 platyodon. 



" The portion of the tooth of the Palaosaurus cylindrodon which has been preserved, 

 shows that the crown is sub-compressed and traversed by two opposite finely-serrated 

 ridges, as in the Thecodontosaurus and Hhopalodon ; its length is five lines, its 

 breadth at the base two lines." (Owen.^) 



The Reptilian remains herein described " were found in quarrying the brecciated 



^ Eleventh Rep. Brit. Assoc, p. 154. 



