228 Baron F. von Huene on Phytosaurian Bemaitis 



Snrcouf, MS., T. sharpei is distinguished inter alia by the 

 broader front, the much shorter and broader basal portion of 

 the third joint of the antennpe, the shorter palpi, conspicuous 

 grey stripes on the front part of the dorsum of the thorax, 

 the shape of the abdominal nifirkings, and the hyaline 

 wings. 



XXX III. — Oil Phytosaurian Remains from the Magnesinn 

 Conglomerate of Bristol (Rileya platyodon). By Fried- 

 RiCii Baron Huene, D.Sc, Tubingen, Germany. 



[Plate VI.] 



Some years ago the writer published (Pal. u. geol. Abliandh 

 vi. (x.) 1902, pp. 62 & 63) a description of one humerus and 

 two vertebrae from the Bristol Conglomerate as Phytosaurian, 

 with the new name Piileya hristolensis. Now, after having 

 finished tlie monograph of European Triassic Dinosaurs 

 (which has not yet completely appeared), I find some more 

 Phytosaurian bones, which I propose to describe here. 



The tooth described by Riley and Stutclibury (Trans. Geol. 

 Soc. V. 1836, pi. xxix. fig. 5) as Palceosaurus platyodon (and 

 figured by Owen, 'Odontography,' 1845, pi. Ixii.A, fig. 7) 

 is not a Dinosaurian, but a Phytosaurian tooth. There is no 

 difi"erence between this tooth and some of the Belodont teeth 

 in the Stuttgart Museum. The name Palceosaurus cannot be 

 accepted, because it is preoccupied by Geoffroy for another 

 reptile (Mem. Inst. xii. 1831, p. 48). As this tooth and 

 seven other bones are the only Phytosaurian remains amongst 

 a great many Dinosaurian bones, it is highly probable they 

 belong to the same animal. Some of the bones alone have 

 been called Rileya hristolensis, therefore the generic name 

 Rileya must now comprise the tooth also. Of course the 

 oldest of the specific names has to be applied, so the animal 

 will be called Rileya platyodon, Riley and Stutclibury sp. 



Teeth. — The outline of the broad and compressed tooth 

 (type specimen in the Bristol Museum) is like that of a 

 broad lancet-shaped leaf. The base is a little laced. The 

 sharp anterior and posterior edges are finely serrated, so that 

 in 1 mm. length there are little more than 3 denticules. 

 The latter are disposed vertically to the border. The crown 

 is 17 mm. long and 12"5 mm. in maximum breadth. Another 

 tooth from Bristol is in the British Museum (PI. VI. fig. 1). 



