No. 232S. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 107 



molar; an injured proximal end of a left femur; a complete left 

 calcaneum and a lumbar vertebra and two metacarpals. These have 

 the catalogue number 9210. There are in addition 18 detached teeth 

 which represent the canines, the upper fourth premolars, and the 

 two molars; also the lower third premolar and the first and second 

 molars. The corresponding teeth differ considerably in size; but so 

 they do in recent skulls. An upper right fourth premolar is larger 

 than any corresponding tooth found in recent skulls; but probably 

 further search would remove the difference. Its length is 13.4 mm. ; 

 its width 10 mm. The total length of the calcaneum is 74 mm. To 

 all these loose teeth have been given the catalogue number 9211. 



Family FELIDAE. 



SMILODONTOPSIS MOOREHEADI, new species. 



Plate 4, figs. 21-22. 



Type specimen. — An upper sectorial tooth. 



Type locality. — Cavetown, Washington County, Maryland. 



Type f orraation. — Pleistocene. 



Diagnosis. — Of moderate size. No protocone. Preanterior lobe 

 very small. 



In the Cavetown collection there is an upper right sectorial tooth 

 (Cat. No. 9212) which appears to belong to an undescribed species 

 of saber-tooth cat. It is that of the right side. It had not yet come 

 into use and the roots had not yet developed. Views are presented 

 showing the inner face of the tooth, and the crown from above (pi. 4, 

 figs. 21, 22). The length of the crown is 26.5 mm.; the height of the 

 paracone, 14 mm. ; of the metacone, 9.5 mm. The width in front is 11.5 

 mm. ; at the metacone, 8 mm. The protocone is absent. There would 

 probably in time have been an inner anterior root. The metacone 

 has the same length as the principal cone. Its edge is thick and is 

 divided by a broad and very shallow transverse groove. The ante- 

 rior basal lobe is larger than that of the corresponding lobe in a 

 large specimen of the Oregon mountain lion {Felis oregonensis) . At 

 its base in front is what may be regarded as an extremely small, sharp 

 preanterior lobe, which grows up from the cingulum. The latter 

 presents one or two distinct tubercles on the outer face of the ante- 

 rior lobe. From the apex of the anterior lobe there is a sharp edge 

 which runs down on the inner face to the base of the internal root. 

 This lobe constitutes hardly one-fourth of the whole lenp^th of the 

 crown. The buttress descending from the summit of the principal 

 cone to where one would look for the protocone is feebly exDressed. 

 On the inner side the edge of the crown has been splintered oil. This 

 tooth resembles that figured by Barnum Brown ^ as S. conardi, but it is 



^Mem. Amer. Mus. Nat. Hist., vol. 9, 1908, p. 190, pi. 19. 



