EEPTILIA OF KIRTLAND FORMATION GILMORE 163 



Slimed to belong to this same individual. The teeth of the functional 

 series are much worn and extend but little below the alveolar border 

 on the internal side. They have smooth borders, with strong median 

 carinae, and none shows evidence of being papillate. In the present 

 state of our knowledge concerning the teeth of the Hadrosauridae, 

 the dentition of this specimen gives no assistance in its identification, 

 especially since the teeth of the contemporary forms have not as yet 

 been adequately illustrated or described. 



The left femur preserved with this specimen is in an excellent 

 state of preservation, except for the loss of portions of the head. 

 It is typically hadrosaurian and differs from the femur of P. walkeri 

 in having the posterior extremity of the fourth trochanter precisely 

 at mid length, whereas in P. umUceri it is well below the middle. 



Although this specimen is provisionally referred to P. tuhicen^ 

 it may eventually be found to belong to a form as yet unrecognized 

 in the Kirtland formation. 



Family CERATOPSIDAE 



PENTACERATOPS STERNBERGII Osborn 



Plate 13, Figiibb 2 



The genus Pentaceratops was established by Professor Osborn 

 (1923) on a well-preserved skull found by C. H. Sternberg in the 

 Fruitland formation. In 1929, George F. Sternberg collected a 

 nearly complete right squamosal (U.S.N.M. no. 12002) (see pi. 13, 

 fig. 2) in SW.y^, T. 24 N., R. 13 W.. San Juan County, N. Mex., 

 from the Kirtland formation, which Lull (1933) identifies as per- 

 taining to this species, thus recording the presence of P. sternhergii 

 in the Kirtland formation. A second specimen (U.S.N.M. no. 12743) , 

 consisting of a supraorbital horn-core and parts of a squamosal from 

 this same locality and formation, is quite certainly referable to 

 P. stcr7ibergii. The horn-core in size, shape, and curvature closely 

 resembles that of the type specimen. The two other known speci- 

 mens (Amer. Mus. Nat. Hist. nos. 1624 and 1625) are said to have 

 come from the Fruitland formation. 



PENTACERATOPS FENESTRATUS Wiman 



This species was founded (Wiman, 1930) on a crushed but essen- 

 tially complete skull, collected by C. H. Sternberg on the north 

 branch of Meyers Creek, 1 mile south of Kimbetoh Wash, San Juan 

 County, N. Mex., from the Kirtland formation. A single fenestra 

 in the squamosal bones distinguishes it from P. sternbergii and a]D- 

 parently was the character that suggested the specific name. Lull is 



