I poo.] Osborn, Oxycena and Pairiofelis Restudied. 279 



and a posterior cusp, or talonid, with a small basal postero- 

 internal cusp. 



Loti'er molars. — First, a relatively small tooth ; antero-poste- 

 rior diameter of fangs ==. 170 ; in No. 4805 the posterior half of 

 the crown only is preserved ; it exhibits the protoconid, a small 

 elevated metaconid ; the talonid is narrow and feebly tri-cuspi- 

 date ; in No. 1508 the paraconid is partly preserved ; Second, 

 a powerful shear (No. 4508, Fig. 7, B) formed of an out- 

 wardly placed paraconid and a sharp elevated protoconid ; the 

 metaconid vestigial or represented by a very low ridge ; the 

 talonid reduced to a cingulum. 



First upper ftwlar. — (No. 2303, Fig. 7, A, and No. 1508, A, 

 both teeth of the left side.) This is a powerful carnassial ; the 

 elongated shear (No. 2303) consists of the greatly modified 

 trigon and metastyle ; the protocone is depressed and reduced to 

 a basal spur ; the paracone and metacone consist of a pair of ele- 

 vated connate subequal cusps ; the metastyle is an elongate less 

 elevated shear. In the greatly worn condition seen in No. 1508, 

 A, as well as in No. 2691, F. ulta, the crown of the tooth retains 

 its sharpness, proving that these teeth were employed as in Felis. 



BIBLIOGRAPHY. 



1900. OsBORN, H. F. The Angulation of the Limbs of Proboscidia, Dino- 

 cerata, and other Quadrupeds in Adaptation to Weight. Amer. 

 Nat. Vol. XXXIV, No. 398, pp. 89-94. Boston, Feb. 1900. 



1894. WoRTMAN, J. L. Osteology of Patriofelis, a Middle-Eocene Creo- 

 dont. Bull. Amer. Mus. Nat. Hist. Vol. VI, Art. V, pp. 129- 

 164. New York, May 24, 1894. 



1899. WoRTMAN, J. L. Restoration of Oxya-na lupina Cope, with De- 

 scriptions of Certain New Species of Eocene Creodonts. Bull. 

 Amer. Mus. Nat Hist. Vol. XII, Art. VII, pp. 139-148. New 

 York, June 21, 1899. 



