94 



CENOZOIC MAMMAL HOKIZONS 



LOWER EOCENE— Continued. 

 TILLODONTIA. 



? Anchippodontid^. 

 1. 2. 3. 



Esthonyx burmeisteri Cope 



Esthonyx acer Cope 



Esthonyx bisulcatus Cope. . 

 Esthonyx spatularius Cope 



Paramys primfevus Loomis. 

 Paramys quadratus Loomis 

 Paramys atwateri Loomis . . 

 ? Seiuravus buccatus (Cope) , 



Esthonyx acutidens Cope. . 

 Esthonyx spatularius Cope. 



RODENTIA. 



ISCHYROMYID^. 







X 









X 









X 



X 



Paramys bicuspis Loomis. . . 



Paramys copei Loomis 



Paramys major Loomis 



Paramys excavatus Loomis. 

 Seiuravus depressus Loomis 



T^NIODONTA. 



Stylinodontid^. 



Calamodon simplex Cope 



Calamodon arcamoenus Cope. 

 Calamodon novomehicanus Cope 

 Ectoganus gUriformis Cope. 

 Dryptodon crassus Marsh. . 



Phenacodus primsevus Cope 



Phenacodus nunienus Cope 



Phenacodus hemiconus Cope 



Phenacodus astutus (Cope) a 



Phenacodus flagrans (Cope) 



Phenacodus brachypternus Cope 

 Phenacodus macropternus Cope. 



?Phenacodus sulcatus Cope b 



Eohyus distans Marsh 



Eohyus robustus Marsh 



Ectocion osbornianus Cope 







X 



X 









X 









X 









X 



Stylinodon cylindrifer (Cope) 



CONDYLARTHRA. 



Phenacodontid^. 



X 





X 



X 







X 









X 









X 



X 









X 







X 









X 











X 







X 





Phenacodus wortmani Cope. 



Phenacodus sp 



Ectocion cf. osbornianus 



Meniscotheriid^. 



Meniscotherium terrserubrfE 

 Cope. 



Meniscotherium chamense Cope. 

 Meniscotherium tapiacitis Cope. . 



Coryphodon radians Cope 



Coryphodon testis Cope 



Coryphodon lobatus Cope 



Coryphodon elephantopus Cope. 



Coryphodon hamatus Marsh 



Coryphodon latidens Cope 



Coryphodon curvicristis Cope. 

 Coryphodon armatus Cope . 



AMBLYPODA. 



CORYPHODONTIDiE, 



Corj'-phodon ventanus Osborn 

 Coryphodon wortmani Osborn 

 ?Coryphodon singularis Osborn 



EOB ASILEiD.E ( = UlNTATHERlID^) . 



Bathyopsis flssidens Cope. 

 PERISSODACTYLA. 



1 X 



i X 







X 



X 





I X 



X 



X 



X 



:x 



X 



X 



Heptodon posticus Cope 



Heptodon singularis (Cope) b 



Systemodon tapirinus (Cope) . . .1 



Systemodon protapirinus Wort- 

 man I 



Systemodon primsevus Wort- ' 

 man . 



Systemodon semihians Cope .... I 



LOPHIODONTIDiE 



X I 



I X 

 Tapirid^. 



i X 



Heptodon calciculus Cope. 

 Heptodon ventorum'Cope. 



o P. wortmani Cope in part. 



^Incertfe sedis. 



