248 VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 



that of the Smilodons. The internal root, however, I find is present, showing that 

 the species cannot be referred to Dinobastis. It is the absence of the protocone 

 which led me to suppose that this tooth is an inferior sectorial, and to refer it to a 

 species of hyena under the name of Crocuta inexpedata, with a reservation in favor 

 of its possible pertinence to a feline animal. This suspicion is now fully confirmed. 

 The parastyle is robust and has no preanterior lobe. The paracone is rather sym- 

 metrical, and. has an angle on the internal side extending from the apex to the 

 base of the internal root, which is weak in the recent Uncias, and is distinct in 

 Smilodon gracilis. The metacone projects well posteriorly, and has an undulate 

 cutting edge as in the Uncias. The size is about that of the sectorial of the jaguar. 

 The fragment of a second superior sectorial tooth, already referred to, is identical in 

 character with the complete one. Enamel smooth. 



The inferior sectorial has the erect metaconid characteristic of the genus, the 

 cutting edge being very steep, and the apex more elevated than that of the para- 

 conid. The heel is represented by a slight swelling at the base of the metaconid. 

 The tooth has quite the form of that of the jaguar. The first premolar has the 

 erect cusp and large anterior basal lobe of that species. The principal cusp is much 

 more convex on the internal than on the external side. The posterior lobe is well- 

 developed, and the heel is a cingulum without median cutting edge. The crown 

 is wider posteriorly than in Smilodon, having the robust character of the corre- 

 sponding tooth in the recent Uncias. 



The crowns of the incisors are short, decurved, and with acute apex. They 

 are robust, and an external basal lobe is present in all three. 



The distal half of the shaft of the humerus has lost the condyles. The entepi- 

 condylar foramen is a large vertical oval. The external border of the shaft as it 

 expands to the epicondyle differs from the corresponding part in the existing species 

 of Uncia, in being thicker and not alate. It terminates upward in a low ridge 

 which is soon lost. Its size is about that of the jaguar. 



The third and fifth left metacarpals and half of the fourth are perfect. The 

 unciform facet of the third is distinct. The diaclast of the fourth is elongate, and is 

 rounded in transverse section. The diaclast of the fifth differs from it in having an 

 acute margin. When in place these metacarpals are divergent. The external side 

 of the proximal extremity of the fifth metacarpal has two faces ; one looking out- 

 ward, upward and forward, the other looking directly outward. Its shaft is of 

 moderate length. 



The phalanges have the general character of those of the jaguar and leopard. 

 This applies to those of all the series, including the ungual. 



Measurements. 



mm. 



T vertical (paracone) ; 10 



riaw an 



Diameters of superior sectorial X anteroposterior ; 24 



(transverse (at roots) ; 9.5 



