SPECIES OF AMERICAN LION. A'2i 



The anterior tubercle is very much broader than in Felis spelaea, and resembles more in 

 it- form that of the Tiger; its salient edge being antero-postcriorly convex. The poste- 

 rior tubercle rises very slightly higher than the anterior, and its antcro-posteriorly convex 

 margin descends to the outer side of the posterior heel of the tooth. The base of the 

 crown presents a slight crescentic, roughened, salient line or ridge antcro- and postero-ex- 

 ternally. 



The first molar also, as in the case of the tooth last described, is relatively greater in 

 the antcro-postcrior diameter of the crown, compared with the length, than in the Tiger. 

 The middle conoidal lobe slopes off gradually antero-externally to the base of the anterior 

 prominent convexity of the crown, and its trenchant margin descends in a crescentic line 

 forwards and inwards. The posterior tubercle is large and distinct, and its bottom pos- 

 tero-cxtcrnally presents a quite salient basal ridge 



Admeasurements of the fragment of lower jaw of Felis ulrox, in comparison with F. leo, F. ligris, and 



F. spelsea. 



Depth of lower jaw below the carnassial tooth, . 



Depth below the first molar, 



Length from the posterior part of the carnassial 

 tooth to the front of the canine, .... 



! th of the molar series, 



Extent of hiatus anterior to the molars, . . . 

 Aitcro-posterior diameter of first molar, . . 



do do second do . ... 



do do third do ... . 



deasnrementa taken from aLioni 



• •ments taken from a very largi- cimen, from India, preserved in tin- Cal I u! the Academy of Natural 



■ •es. 

 i iei ' >--• men l t . t . T . p. i i 



$ Ibid. PI. 194, Fig. 7. 



REFERENCES TO PLATE I! I. 

 Figures the size of nature. 



. 1 represents the left side of the low< r jaw of Felis alrox ; the osseous portion entirely cone air, 1 l>y a 

 thick envelope of oxide of iron, from which the teeth protrude. 

 Fig. 2. — Outer view of the canine tooth, removed from its sock' t. 



