76 CARNIVORA order m 



Occipital high Mid narrow projecting mastoid process, which becomes larger. Upper 

 canine protected hy a downward flange of the mandible. Extremities robust, hallux 

 and pollex strong, digits expanding. 



3.1.2.1. 

 Eusmilus Gervais. ' ' ' ' • ilf ^ lacking talonid and metaconid. Flanges 



of mandibular symphysis pendulous. E. bidentatus Filhol. Quercy Phosphorites. 



E. dacotensis Hatcher. Upper Oligocene ; Dakota. 



3.1.3-2.1 

 Hoplophoneus Cope (Pogonodon Merriam). Dentition ' ' ' ' • M^ 



o-Z. 1 . o-Z. i, 



without metaconid. P f and P |- small, P^ generally wanting, upper C 



slender. Auditory bulla incompletely ossified. White Kiver beds (Oligocene). 



H. occidentalis Leidy. 



3.1.2-1.1. 

 Machairodus Kaup. — P^ usually with four external cusps. 



Mj lacking metaconid and usually talonid. P -f rudimentary. C long, 

 notched posteriorly. Mandibular flanges large. Bulla completely ossified, 

 ilf. palmidens Blv., La Grive St. Alban. M. jourdani Filhol. M. aphanistus 

 Kaup. Lower Pliocene of Pikermi, Veles, Eppelsheim and Samos. 3£. orientalis 

 Macquenem. Maragha. 31. horribilis Schlosser. China. M. sivalensis Lyd. 

 Siwalik. M. cultridens Cuv. 31. crenatidens Fabrini. Upper and Middle 

 Pliocene of Europe, il/. latidens Owen. European Pleistocene. 



Smilodon Lund (Trucifelis Leidy ; Dinobastis Cope ; Smilodontopsis Brown). 



3.1.2.1. 



^ • LTpper carnassial usually with only three outer cusps. 31 -^ lacking 



o~Z, i . Z- 1 . i . 



talonid and metaconid. P^ small, P^ generally lacking. Hallux strongly 



developed. Restricted to the American continents. In the Pleistocene of 



North America. S. gracilis Cope; S. floridanus heidy ; S. calif or nictis Msitthew. 



In South America, S. neogaeus Lund. 



Subfamily 2. Felinae. 



Carnassials deeply notched. Upper carnassial with strong inner cusp. Upper 



C becoming smaller by degrees; lower C becoming larger. P^ large, P^ and P^ 



of like strength. 3Iastoid process reduced, coronoid process enlarged. Hallux 

 reduced. Extremities elongated, digitigrade. 



Aelurictis Trouessart {Aelurogale Filhol). f P, | 31. 31.-^ weak, 31^ 

 lacking metaconid, with strong talonid. Symphysis with acute border. 

 Large metapodials. Quercy Phosphorites. A. intermedia, A. minor Filhol. 



Binicfis Leidy (Daptophilus Cope) (Fig. 106). f P, J 31. In some cases 



there are four inferior premolars. 31- occasionally present. 31 -^ with 



talonid and metaconid. C long, feebly serrated posteriorly. Mandibular 



symphysis with pendulous flanges. Carotid foramen distinct from foramen 



lacerum posterius. Auditoiy bulla incompletely ossified. Hallux functional. 



Metapodials short. D. felina Leidy. D. squcdidens Cope. White River 



beds (Oligocene), North America. D. cyclops Cope. John Day beds (Lower 



Miocene) ; Oregon. 



4-3 1 



Nimravus Cope (Archaelus, Pogonodon Cope). Dentition ^— P, 31. 



Greatly resembling Aelurictis. 31^ lacking metaconid, C moderately developed. 



