VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 251 



the right superior sectorial and left superior canine. Possibly belonging to the same 

 animal is a left superior sectorial. Then there are a pm^ and two pm. A third 

 specimen is represented by a part of the right mandibular ramus which supports the 

 three molars. A fourth includes fragments of both mandibular rami with all the 

 molars and a part of one canine. 



From the last specimen I infer the. existence of a species of Lynx, different 

 from either of those now inhabiting North America. Its conspicuous character is 

 the production of the base of the protoconid inward and backward into a rudimental 

 heel. In the fourth specimen this supports a distinct metaconid, while in the third 

 the heel is equally produced, but forms only a thickening without a free apex. I 

 do not observe this form in seven skulls of the existing North American lynxes 

 before me. As to other characters, the inferior canine displays grooves arranged as 

 in the living species referred to. The two inferior dentitions differ from each other 

 in the development of the posterior lobe of the second premolar. In No. 4 it is 

 strong as in L. canadensis, while in No. 3 it is weak as in L. rufus, although both 

 specimens have the same dimensions. In the latter also, the pm T has a weaker 

 anterior basal lobe than in No. 4, but the difference is slight. 



It has occurred to me that the mandible no. 4 belongs to the ocelot [Felts 

 pardalis), which sometimes has a rudimental heel and metaconid of the sectorial. 

 The accompanying canine is, however, that of a lynx, and the mandible No. 3 can- 

 not be separated from No. 4 specifically, while its sectorial differs from that of the 

 lynxes. It is also not likely that, since the superior dental series are those of lynxes, 

 the inferior series belong to another genus. 



The superior dental series is that of a lynx of the size of L. rufus. In speci- 

 men No. 1 the only peculiarity noticeable is that the protocone of the sectorial is a 

 little posterior to the usual position, its anterior border falling opposite the notch 

 between the paracone and anterior basal lobe. In specimen No. 2 the protocone 

 has the position seen in the existing lynxes. In No. 2, as in the separate superior 

 sectorial, there is a small preanterior lobe, a character sometimes seen in existing 

 lynxes. 



Measurements. 



mm. 



Length of dental series from I. 3, inclusive ; no. 1 ; 42 



" of diastema; 4 



" of molars ; 23 



" superior sectorial ; 14 



Width of " " at protocone ; 7 



Length of bases of pm^-j and m T ; no. 3 ; 29 



" of base of m T ; 12 



Length of bases of pm^.g and m T ; no. 4 ; 32.5 



tv , ( vertical ; 6 



Diameters, pnw < , , ■ D r 



' i 2 (anteroposterior; 8.5 



tv , j vertical; 7 



Diameters, pm T < , ■ in 



1 l (anteroposterior; 10 



tv , f vertical ; 7 



Diameters, m T < , ■ -, 



1 ( anteroposterior ; 12 



Length of diastema; 5.5 



Depth of ramus at m T , inside ; 15 



