REPTILIA OF KIRTLAND FORMATION GILMORE 187 



Gilmore. Additional evidence favoring such a conclusion is found 

 in the turtles. The Chelonia are now represented by 8 genera and 

 11 species, all based on adequate specimens. Six of the eight genera 

 are common to the two formations. The genus Boremys has not 

 been found elsewhere. Thescelus occurs elsewhere in the Lance and 

 Neura/nkylus only in the Benton. Baena and Bmilemys enjoy a wide 

 geological distribution and offer no correlative evidence. 



The Crocodilia and Pisces are too fragmentary to be of assistance. 



The Upper Cretaceous age of the Kirtland formation is accepted 

 by all, but some differences of opinion exist as to the particular 

 part of the Upper Cretaceous with which it should be correlated. 



On the basis of the invertebrate faunas, Drs. T. AV. Stanton and 

 J. B. Reeside, Jr., are of the opinion tliat it is synchronous with the 

 Edmonton, a viewpoint accepted by Prof. Lull (lOS'o) in his revision 

 of the Ceratopsia. Brown, in his first study of the Ojo Alamo, which 

 at that time included the Kirtland, expressed the opinion that it was 

 comparable to the Edmonton. Upon the discovery of Kritosawnis^ 

 however, Brown (1914) altered his idea to make it synchronous with 

 the Belly River, a viewpoint to which I later gave support (Gilmore, 

 1916). 



In the light of this more recent study of new vertebrate materials, 

 it is my conclusion that the Kirtland and Belly River are equivalent 

 in age. Whether distinct faunas are to be found in the several Upper 

 Cretaceous formations occurring in this area cannot yet be estab- 

 lished. Such evidence as there is appears to indicate that genera and 

 even species continue through from the Fruitland to the Ojo Alamo. 



LITERATURE CITED 



Beown, Barnum. 



1914. Cretaceous Eocene correlation in New Mexico, Wyoming, Montana, 



Alberta. Bull. Geol. Soc. Amer., vol. 25, pp. 35.5-3S0. 

 1933. A new longhorned Belly River ceratopsian. Amer. Mus. Nov., no. 669, 

 pp. 1-3, 3 figs. 

 GiLiroRE, Charles Whitney. 



1916. Vertebrate faunas of the Ojo Alamo, Kirtland, and Fruitland forma- 

 tions. U. S. Geol. Surv. Prof. Paper 98-q, pp. 279-308, 14 figs., 

 7 pis. 



1919. New fossil turtles, with notes on two described species. Proc. U. S. 



Nat. Mus., vol. 56, pp. 113-132, 8 figs., 9 pis. 



1920. Reptilian faunas of the Torrejon, Puerco, and underlying Upper Cre- 



taceous formations of San ,Juan C'ounty, N. Mex. U. S. Geol. Surv. 



Prof. Paper 119, 71 pp., 26 pis. 

 Hay, Oliver Perry. 



1908. The fossil turtles of North America. Carnegie Inst. Washington Publ. 



75, iv-f 568 pp., 704 figs., 113 pis. 

 1911. Descriptions of eight new species of fossil turtles from west of the 



one hundredtli meridian. Proc. U. S. Nat. Mus., vol. 38, pp. 307-326, 



23 figs., 3 pis. 



