214 PALEONTOLOGY 



There is a ligamentous or unossified space at the back part 

 of both carpus and tarsus (fig. 69, 68). At present there is 

 evidence of but four digits in both the fore and hind paddles 

 of Nothosawrus ; the metapodial and phalangeal bones are of 

 the elongate flattened simple form, characteristic of supports 

 of a tegumentary fin. 



One species of Nothosaurus (i\ r . Schimpcri, Von. M.) is from 

 the lower division of the trias, called "gres bizarre^' of Soulz- 

 les-Bains ; the other representatives of the genus (N. gigantcus, 

 N. venustus, iV. Milnsteri, N. Andriani, N. angustifrons, and 

 N. mirabilis), are from the muschelkalk of Bayreuth and 

 Luneville. 



Genus Pistosaurus, Von Meyer. 



Sp. Pistosaurus longwvus. — In this genus the facial part of 

 the skull contracts abruptly in front of the orbits ; so that, 

 viewed from above, it resembles a long-necked bottle ; the 

 orbits are situated in the posterior half of the skull, and the 

 nostrils are lateral. From the muschelkalk of Bayreuth. 



Genus Conchiosaurus, Von Meyer. 



Sp. Conchiosaurus clavatus. — The facial part of the skull is 

 less prolonged than in Pistosaurus, and the nostrils are 

 terminal. The teeth are twelve in number on each side, are 

 subequal, with a pyriform crown, and are placed at widish 

 intervals. From the muschelkalk at Laineck, near Bayreuth. 



Genus Simosaurus,* Von Meyer. 



Sp. Simosaurus Gaillardoti. — The fossils, chiefly cranial, 

 on which this genus is founded, occur in the dolomitic 

 muschelkalk near Ludwigsberg, and in the muschelkalk of 

 Luneville. The skull presents the large temporal fossae, the 

 divided nostrils, and the general depressed form and compo- 

 sition of that of Nothosaurus and Pistosaurus. But its facial 

 part is much shorter ; the muzzle is neither prolonged nor 

 terminally expanded, but forms the obtuse end of the short 



* 2ijuos, sinih nnscl, flat-nnse. 



