WILLISTON : NOTES ON SOME EXTINCT REPTILES. 263 



have to thank Professor Beecher for permission to examine 

 them : 



Lestosaurus gracilis Marsh. The type consists of fragments of 

 the skull and cervical vertebrae. The vertebrae show much 

 compression, as do also the bones of the skull. The fragment 

 of the parietal is normal, the opening rather large. Quadrate 

 somewhat distorted. The specimen is a little smaller than 

 usual. It is apparently identical with Platecarpus coryphaeus. 

 No. 1264. Three miles east of Fort Wallace, north side of 

 Smoky Hill river, August 31, 1871. 



Lestosaurus simus Marsh (Platecarpus ictericus) . No. 1352. 

 Seventeen miles east of Fort Wallace, south side of Smoky 

 Hill, in blue shale, July 26, 1871. 



JlJdnosaurus micromus Marsh. South side of Smoky Hill 

 river, November 2, 1872. 



Edestosaurus dispar Marsh. North fork (?) Smoky Hill river. 



Edestosaurus velox Marsh. "Fossil from Sheridan, Kan., col- 

 lected by Savage, November, 1870." Marsh's handwriting. 



Edestosaurus rex Marsh. Three miles southeast of Fort Wal- 

 lace, eight feet below top of blue shale, July 10. Is Clidastcs 

 tortor. 



Lestosaurus felix Marsh. Fourteen miles east of Fort Wallace, 

 July 15, E. S. Lane. Is Platecarpus coryphaeus, apparently, 

 though the sides of the frontal bone show only a moderate emar- 

 gi nation. 



Hadrosaurus agilis Marsh. Twenty-six miles east of Fort 

 Wallace, north side of Smoky Hill river. Is from the Nio- 

 brara, the bones showing the characteristic compression. 



Dr. M. Janischewsky 4 figures and describes a bone which 

 he believes to be a mosasaur coracoid from "den untertertiaeren 

 Ablagerungen des Gouv. Saratow." I regret my inability to 

 read the Russian text of his article, but, from the resume and 

 the figures, I hardly think the bone can pertain to a mosasaur. 

 The size would be enormous for a mosasaur — fully twice that of 

 any known species. Though incomplete, the shape of the bone 

 is somewhat unlike that of any mosasaur coracoid known, 

 though the resemblance is evident. It seems to be a reptilian 



■&■ 



4. In Ann. Geol. et Min. de la Russe, v, p. 94, 1902. 



