NO. 2291. MAMMALIAN AND FISH REMAINS FROM FLORIDA— HAY. 107 



It will be seen at once that the Vero tooth was probably that of a 

 larger species than T. fatalis and that the crown is everywhere higher 

 in proportion to its length. As may be seen from comparing the 

 figures of the two teeth, the width of the principal cusp at its base is 

 one-half of its height, while that of T. fatalis is relatively consider- 

 ably wider. The two teeth agi-ee in having the protocone absent 

 and in having the anterior lobe divided into two parts. It appears 

 certain that the Vero tooth does not belong to T. fatalis. The latter 

 was found at Sour Lake, in Hardin County, Texas. 



Through the courtesy of Mr. John G. Rothermel, director of the 

 Wagner Free Institute, the writer has been able to examine the 

 upper jaw of Leidy's t^-pe of Machairodus florid anus. The carnas- 

 sial possessed in front two roots, of which the inner was somewhat 

 reduced in size and pushed backward, as in the Vero tooth, to nearly 

 opposite the interval between the anterior outer root and the great 

 hinder root. It is quite certain that the anterior lobe of the tooth 

 was much larger than it is in the lion and the tiger. The alveolus 

 has a length of 37 mm. ; that part for the hinder root is 24 mm. long. 

 The tooth was therefore only slightly larger than the Vero tooth; 

 and there appears to be no reason why the latter can not be with 

 much certainty referred to Leidy's species. 



In the deposit at Vero which furnished the carnassial Doctor Sellards 

 found a part of a great canine tooth Avhich belonged to some one of 

 the Machairodontinae. The fragment (pi. 28, fig] 3) is 67 mm. long. 

 Probably nearly 25 mm. of the distal extemity is gone. The upper 

 end does not reach the base of the crown. In the Ocala skuU the 

 socket for the canine measures 40 mm. in length fore and aft and its 

 width is 20 mm. At its upper end the fragment from Vero has a 

 width for and aft of 30 mm. and a thickness of 13 mm. If the front 

 and rear borders of this tooth are continued until the distance between 

 them is 40 mm. and the distal extemity is restored, a tooth is indi- 

 cated whose crown was about 1 1 mm. long. Both borders are acute, 

 more especially the hinder one, which is knife-like. The anterior 

 edge is smooth, but the hinder one is obsoletely crenulated. The 

 tooth is quite different from that of Barnum Brown's Smilodontopsis 

 conard%.' In the latter the base of the fragment has the same fore and 

 aft diameter as does the Vero tooth. At a distance of 55 mm. from 

 this, toward the tip, the fore and aft diameter is 19 mm.; in the Vero 

 specimen, only 16 mm. In Smilodontopsis coiiardi both edges are 

 crenulated. In Cope's Smilodon gracilis => the powerful canine main- 

 tains weU its breadth as the tip is approached; and both edges are 

 free from denticles (Cope). For comparison there is figured here 

 (pi. 28, fig. 4) a right canine tooth evidently belonging to Dinolastis 



1 Mem. Amer. Mus. Nat. Hist., vol. 9. p. 190. pi. 19. 

 » Journ. .\cad. Nat. Sci. Phila., vol. 11, pi. 20, fig. 1. 



