108 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58, 



considerably smaller than in Brown's species, and the protocone of the 

 latter forms a distinct tubercle. The sectorial of the Cavetown spe- 

 cies is likewise smaller than that of Cope's Machairodus gracilis^ 

 in which this tooth has a length of 34 mm. As to Cope's Smilodon 

 mercerii it is difficult to determine its size. The impression is given 

 that it is somewhat smaller than Machairodus gracilis, but the meas- 

 urements of some teeth indicate equality of size. What appears to 

 be the measurements of the upper sectorial, but spoken of as pm, 

 (bottom of Cope's p. 246), gives the length as only 21 mm. Cope's 

 figure 2 of his plate 20 probably represents this upper sectorial of 

 reduced size. In this figure the paracone towers above the rest of 

 the tooth more than in the Cavetown tooth. On page 247 of Cope's 

 paper cited is a description of Felis inexpectata. The tooth figured 

 on his plate 21 resembles considerably the Cavetown tooth; but it 

 was regarded as having had a protocone; also there is an angle on 

 the internal side of the paracone descending to the protocone. This 

 is extremely feeble in the tooth here described. The length is given 

 by Cope as 24 mm. ; the height of the paracone, 10 mm. ; the width 

 at the roots, 9.5 mm. Bamum BroAvn's species Felis longicrus may 

 be mentioned (his paper above cited, p. 187, pi. 18). It, too, possessed 

 a protocone. Also the base of the tooth is constricted at the paracone. 

 In the collection there is a crown (Cat. No. 9213), or rather a 

 part of a crown, of a canine tooth (pi. 4, fig. 23), taken to be a 

 left upper, which the writer has not been able to identify satisfac- 

 torily, either generically or specificall3^ It is quite difi'erent from 

 the canines of the mountain lion. It is relatively thin, has sharp edges 

 in front and behind, and the two sides are equally convex. The tooth 

 had probably not been cut, as the great pulp cavity remained and is 

 now full of red clay. On what is probably the outer face some of 

 the material of the tooth is gone. On the other face there appear 

 eight or nine longitudinal ridges, with intervening grooves. They 

 continue to about 10 mm. from the tip of the tooth, and are more 

 distinct toward the base. There are seen traces of similar ridges 

 and grooves on the injured face of the tooth. The tooth as preserved 

 is 25 mm. high. The long diameter at the base was close to 10 mm. ; 

 the transverse diameter, close to 6 mm. The writer suggests that 

 this was a milk canine of a saber-tooth cat, possibly of the species 

 here described ; possibly of the same individual. Besides these teeth, 

 there is present from Cavetown the proximal end of a femur (Cat 

 No. 9214) of some large cat-like animal. It resembles closely the 

 same part of a tiger from the Malay Peninsula (No. 49728, 

 U.S.N.M.), and it is but little smaller. In the tiger the distance 

 from the inner surface of the head of the femur to the outside of the 



I Journ. Acad. Nat. Sci. Phila., vol. 11, 1899, pp. 240-244. pi. 20. 



