NO. 2198. A NEW SPECIES OF MASTODUX—HAY. 221 



The region about McPherson is covered by deposits which belong 

 to the Sheridan, or Equus, beds. We ha^-e in this tooth, therefore, 

 evidence that the bunolophodont mastodons continued on into the 

 Pleistocene. This is confirmed by the discovery of an upper second 

 molar probably of this species and of a maxilla with two teeth of 

 another species in the Pleistocene of Texas. The latter will be 

 described and figured elsewhere. 



The upper second molar mentioned above belongs to the right 

 side. The tooth is in the collection of Baylor University, at Waco, 

 Texas. It was found in Pleistocene deposits on Hog Creek, McLen- 

 nan County, near Speegleville, a town about 8 miles west of Waco. 

 The crown is practically complete, but the roots are missing. The 

 length is 145 mm., the width 90 mm. There are three crests and a 

 large talon. The wear on the two anterior crests has produced on 

 the inner half of each a large trefoil. Where the enamel of these 

 trefoils joins the outer cones it is considerably folded. There are 

 very distinct buttresses on the outer halves of the crests, especially 

 of the first and second. The anterior buttress of the second crest is 

 double. 



This tooth is larger than the corresponding one of any other masto- 

 don known to the writer ; but its size corresponds to that of the type 

 tooth. Its complication is greater than in the hinder molar, but that 

 might be expected. This tooth resembles somewhat those which 

 Cope ^ has referred to G. hu7nboldii; but the crests are not so closely 

 appressed and the enamel is not so strongly folded. The tooth de- 

 scribed by Cope belonged to the Blanco Pliocene. 



EXPLANATION OF PLATE 26. 



Gomphotherim elegans. X \. 



Figs. 1, 2. Lower third molar found at McPlierson, Kansas. 

 Fig. 3. Upper second molar found near Waco, Texas. 



14th Ann. Rep. Geol. Surv. Texas, p. 60, pis. 16, 17. 



