80 



The Badland Formations of the Black Hills Region 



Lower Miocene. 



Nothocyon gregorii, Matthew. 

 Nothocyon vulpinus, Matthew. 

 Nothocyon annectens, Peterson. 

 Nothocyon lemur, Cope. 

 " Amphicyori' superbus, Peterson. 

 Enhydrocyon robustus, Matthew. 

 Bnhydrocyon crassidens, Matthew. 

 Cynodesmus thomsoni, Matthew. 

 Cynodesmus minor, Matthew. 



Upper Miocene. 



Aelurodon soevus (Leidy.) 

 Aelurodon haydeni (Leidy.) 

 Ischyrocyon hyaenodus, Matthew. 



Of the several species named in the above list, Cynodictis 

 gregarius, Figure 12, and Daphoenus felinus, Plate 25, are the 



alafe 



Figure 12 -Restored Skeleton of Cy no. lie Us gregarius. After Matthew, 

 1910. 



best known. Cynodictis gregarius was most abundant, and as the 

 name implies, seems to have roved the country in packs. It was 

 smaller than the common red fox of the eastern states. Daphoen- 

 us felinus was considerable larger, reaching approximately the 

 size of the Coyote (Canis latrans). Both Cynodictis and Daph- 

 oenus in some of their structural characters much resembled the 

 present day civets and Brazilian Bush dogs. In each the facial 

 portion of the skull is short and the cranial portion long. The 

 brain case is small, remarkably so in Daphoenus. The lumbar ver- 

 tebrae are large. The tail is long and stout, much resembling that 

 of the leopard or mungoos. In Cynodictis the hind legs are much 

 longer than the fore legs. In Daphoenus they are more nearly equal. 



