500 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



to a considerable degree, supplemented the data already ac- 

 quired; and types of the orders of Rodents and Carnivores 

 have been added. During the epoch in question, the Ungu- 

 lates were conspicuous on account of their number and vari- 

 ety; and members of the existing families of Rhinocerids 

 and Dicotylids (Peccaries) flourished, in company with sev- 

 eral species of the horse-like Anchitheriids, and with repre- 

 sentatives of the generalized types of Elotheriids and Oreo- 

 dontids. The family of Chalicotheriids, or Brontotheriids, 

 was also apparently manifested under a huge form, which 

 has been distinguished by Cope as a new generic type (Dce- 

 odon sJioshonensis). This is considered by its describer to 

 be " the largest of the North American JPerissodacti/la, with 

 the possible exception of the Menodus Proutii" Among the 

 Carnivores contemporary with these were several Ccmidce, 

 either related to the wolves and foxes of the present epoch, 

 or generically distinct, and a sabre-toothed Felid of the ge- 

 nus JIachcerodus. Rodents of the families of Castoridce 

 (Beavers), Saccoim/idce, and Sciuridce (Squirrels) are also 

 among the novelties added by Professor Cope. 



