EEPTILIA OF KIETLAND FORMATION GILMORE 161 



Family HADROSAURIDAE 

 Subfamily Hadrosaurinae 



KRITOSAURUS NAVAJOVIUS Brown 



Another occurrence of Kritosaui^us navajovius is recorded by 

 U.S.N.M. no. 8629, consisting of the posterior half of the skull, the 

 left ramus, axis, and third and fourth cervical vertebrae. This speci- 

 men was collected by Dr. J. B. Reeside, Jr., in the Kirtland forma- 

 tion, 4 miles southwest of Kimbetoh, San Juan County, N. Mex., in 

 1916. 



It is slightly smaller than the type of the species, but agrees 

 closely with it except in one particular — none of the teeth of the 

 dentary show papillae, but all have smooth borders. The precise 

 number of tooth rows in the dentary cannot be determined from this 

 specimen, although it shows them to be more than 40. 



Subfamily Lambeosaurinae 



PARASAUROLOPHUS TUBICEN Wiman 



Plate 13, Figure 1 



The presence of crested hadrosaurians in the Kirtland formation 

 Avas recognized by me in 1919 on meager materials, but the descrip- 

 tion of ParasauroJophus tubicen by Dr. Wiman (1931) is the first 

 generic recognition of the Lambeosaurinae in these beds. The type 

 specimen, now preserved in the Paleontological Institute of the 

 University of Upsala, Sweden, consists of a partially disarticulated 

 skull, with the posterior half of the characteristic overhanging crest 

 formed by the frontals and premaxillaries, which leaves no uncer- 

 tainty as to the proper assignment of this specimen. It w^as col- 

 lected in San Juan County, N. Mex., in 1921, by C. H. Sternberg. 



U.S.N.M. no. 13492, consisting of a posterior half of the right 

 maxillary with teeth, left femur, posterior end of the left ilium, and 

 the almost complete articulated tail, is, on account of the tall spinous 

 processes on the anterior caudal vertebrae, provisionally referred to 

 this same genus and species. This specimen was collected in T. 25 

 N., R. 13 W., about 6 miles north of Hunter's Store (Bisti P. O.), 

 by N. H. Boss in 1929. The uncertainty of its reference is due to 

 the incompleteness of the specimen on which the genus was estab- 

 lished by Parks (1922), which had only the first four vertebrae of 

 the tail present. 



Since the National Museum specimen lacks the spinous processes 

 of these particular vertebrae, little of value remains for direct com- 



