No. 2328. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 115 



styles are traversed each by a corresponding and very similar rib. In 

 many details they are closely alike. In case Matchie meant that the 

 two sets of teeth are not absolutely alike, that is another matter. The 

 premolars of the two animals do differ, and possibly a distinct genus 

 might be erected on the differences; but that need not exclude the 

 idea that they would be closely related. 



The fourth premolar of the existing eland has its anterior and 

 rear styles thinner and more prominently outstanding than has the 

 fossil. The fossil tooth has its inner face more flattened than that of 

 the existing eland. The same remark is true with regard to the 

 third molar. Also, in the existing eland there is a deep channel just 

 behind the anterior style, which is only slightly indicated in the 

 fossil. In tlie fossil eland the lower molars possess a distinct style 

 on the inner face at the hinder border of the anterior lobe, or 

 metaconid. 



A tooth (Cat. No. 9009) which appears to be the lower right fourth 

 milk molar is represented on plate 5, figure 7. Most of the inner 

 face of the hinder lobe is broken away. The tooth had not yet come 

 into use. Its height is 22 mm., its greatest length 37 mm., its thick- 

 ness 15 mm. There is, besides, a damaged tooth (Cat. No. 9009); 

 which may be an upper milk molar. Its height is 25 mm., its length 

 about 28 mm., its width at the hinder end 16 mm. On the hinder 

 border is a prominent cingulum, which has in front of it a deep pit, 

 somewhat as in the same tooth in Odocoileus. 



SYMBOS PR0MPTUS7 new species. 



To this species are referred a single tooth, taken to be a lower left 

 second molar, whose base is buried in a loess nodule (Cat. No. 9011). 

 The molar is worn down until it is only about 15 mm. high. The 

 crown is 34 mm. long, and 25 mm. wide near the base. The tooth 

 must be referred only provisionally to this species, the type of which 

 is described below, from Afton, Oklahoma. The inner face of the 

 tooth from Afton lacks the styles and ribs which characterize the 

 corresponding tooth of Taurotragus. 



BISON, 8p. indet. 



In the McAdams collection there are found three upper molars 

 (Cat. No. 9012) ; namely, second molars, right and left, and a hinder- 

 most right molar. These are in separate nodules, but they are little 

 or not at all worn, and may all have belonged to the same individual. 

 The following measurements are furnished: 



MEASUREMENTS OF SECOND AND THIED UPPER MOLARS OF BISON IN MILLIMETERS. 



