Marsh Collection, Peabody Museum. 



117 



Lower jaw shallow and relatively very thick from side to side ; 

 symphysis much enlarged ; fibula articulating with calcaneum 

 (Limnocyoii) ; astragalus considerably grooved, and head with 

 comparatively little obliquity. Limnocyoninse. 



Subfamily Oxycenince. 



Of the first of these two subfamilies, as already remarked, 

 there are two known genera Oxycena and Patriofelis / but it 

 is not improbable that a transition or annectent form between 

 these two will be found in Cope's Wind River Protopsalis 

 tigrinus. It appears to be more or less doubtful whether we 

 yet know the exact lines of specific descent in this group. As 

 at present constituted, the genera may be distinguished as 

 follows : 



Dental formula, I. §, 0,\, Pm.f , M.f ; second upper molar present, 

 transverse ; internal cusp of first upper molar distinct ; second 

 lower molar with internal cusp and heel. Oxycena. 



Dental formula, I.-J, C.|, Pm.f , M.-J ; second upper molar absent ; 

 internal cusp of first superior molar vestigial ; second lower 

 molar without internal cusp and with vestigial heel. Patriot 



Patriofelis ferox Marsh. 



Patriofelis Leidy, Proc. Acad. Nat. Sci. Phila., 1872, p. 10 ; 

 Limnofelis ferox Marsh, this Journal, August, 1872, p. 10, Separata ; 

 Limnofelis latidens Marsh, this Journal, August, 1872, p. 10, Separata 

 Oreocyon latidens Marsh, this Journal, November, 1872, p. 406 ; 

 Patriofelis ferox Wortman, Bull. Amer. Mus. Nat. Hist. 



The type of this species, figure 

 65, consists of a fragment of a left 

 lower jaw bearing the last lower 

 molar, together with some few frag- 

 ments of the skull, vertebrae, and 

 ribs. Professor Marsh said of it in 

 his original description, "The tooth, 

 preserved resembles the correspond- 

 ing- one of the lion in its general 

 shape, but is proportionally broader 

 anteriorly, the base of the crown 

 being subtrilateral in outline, with 

 the inner side the longest." This 

 brief description gives the main 

 characters of the specimen very 

 accurately, but it is important to 

 note that more complete specimens 

 have shown the tooth in question 

 not, therefore, strictly homologous 



65 



Figure 65. — Portion of left 

 lower jaw, with last lower molar 

 in place, of Patriofelis ferox 

 Marsh (type of Limnofelis ferox 

 Marsh) ; three-fourths natural 

 size. (Type.) 



to be a second molar ; it is 

 with the sectorial lower 



