Douglass : Some Oligocene Lizards. 283 



Glyptosaurus sphenodon Marsh. 

 American Journal of Science (3), IV, p. 306. 



Referred doubtfully to Glyptosaurus. Teeth different from any 

 previously described from Green River Basin. Crowns of upper 

 teeth long and cylindrical, separated slightly, and directed obliquely 

 backward, compressed and very sharp, bases rugose. Animal two or 

 three feet long. From Henry's Fork, Wyoming. 



Glyptosaurus anceps Marsh. 

 American Journal of Science (3), I, 187 1, p. 458. 



Only vertebrae known. They represent an animal about two feet 

 long. From Grizzly Buttes, Wyoming. 



Rhineura hatched Baur. 



(Figures 3-5.) 

 American Naturalist, Vol. XXVII, 1893, p. 998. 



On the page cited above Dr. George Baur briefly described without 

 figures, two Amphisbaenians, Rhineura hatcheri and Hyporhina antiqua. 



On 1901 Mr. O. A. Peterson obtained two nearly complete skulls 1 

 of the former species and a fragment of a third, from the White River 

 formation on Bad Land Creek in Sioux County, Nebraska. 



Fig. 3. Rhineura hatcheri. (No. 423 A.) Side view of skull. \ nearly. 



The distinguishing characters of Rhineura hatcheri given by Bauer 

 are the following : 



Nasals inferior in position ; the single premaxillary widely separated 

 from the frontals by the nasals which are distinct and which extend to 

 the border of the muzzle overroofing the nostrils ; prefrontal large and 

 placed between the parietal, frontal, and maxillary, forming the 

 superior border of the orbit ; jugal rudimentary and connected with the 



1 No. 423, Carnegie Museum Catalogue of Vertebrate Fossils. 



