CEEODONTA. 



261 



Of the preceding genera it may be remarked that the structure of the 

 feet of Pterodon being unknown, it may be found hereafter to be necessary 

 to remove it from the Oxyosnidce, although I do not anticipate that such a 

 course will be necessary. Palceonydis is only known by the mandibular 

 dentition, which is very near to that of Amhhjctomis. So also it is not certain, 

 but only possible, that Patriofelis belongs to the Mesomjcliidre of the same 

 horizon and locality. The horizontal and geographical distribution of the 

 species of these twenty-seven genera is as follows: 



Arctocyon primoevas Blv 



Hyodectes gervaisi Lem 



Hcteroborus duelii Lem 



Mioclsenus turgidus Cope 



miuiraus Cope 



subtrigonus Cope 



ferox Cope 



baldwini Cope 



protogonioiides Cope . 



bncculentus Cope . . . 



. niandibularis Cope . . . 



Achienodon insolens Cope 



Qviercitheriuiu tenebrosum Filb . 



Diacodon celatiis Cope 



alticnspis Cope 



Ictops bicuspis Cope 



didelphoides Cope 



Peratherium comstockii Cope... 



Deltatherium fnndaniinis Cope . 



interruptus Cope . . . 



baldwini Cope 



Didelpbodus absarokoe Cope 



Stypolopbus viverriuus Cope . . . 

 secundarius Cope . . 

 ranUicuspis Cojte . . 



strenuus Cot)e 



minor Filh 



cavliisi Filh 



Lower 

 Eocene. 



N.A. 



Eur. 



Middle 

 Eocene. 



N.A. 



Eur. 



