NO. 497] EVOLUTION OF TERTIARY MAMMALS 307 



last Aceratherium and Teleoceras), last Chalicotheriidae 

 (Chalicotherium), of Suidae (Sus, last Listriodon), of 

 Traguliclae (last Hyaeinoschus), last Cervulinae (Dicro- 

 cerus, Micromeryx), of Castoridae (last Chalicomys, 

 earliest Castor), of Hystricidae (Hystrix), of Canidae 

 (Simocyon), last Amphicyoninae (Dinocyon), of Ursidao 

 (Hyaenarctos, Ursavus), of Mustelidae (Mustela, Pro- 

 meles, Promephitis), of ViverridaB (Ictitherium), of Fe- 

 lidae (Machairodus, Felis), of anthropoid apes (Dryo- 

 pithecus, Anthropodus). 



2. North American Migrations (perhaps by way of 

 Asia) of one of the Equidae (Hipparion) and of the Lepo- 

 ridae (Lepus). 



3. Afro-Asiatic Migrations of some Bhinocerotidae 

 (Atelodus), of Cervidae (Capreolus), of Giraffidae (Hella- 

 dotherium, Palaeotragus, Camelopardalis, Samotherinm), 

 of several groups of AntilopidaB (Palaeoryx, Gazella, 

 Palaeoreas, Protragelaphus), of Ovidae (Criotherium), of 

 Hyaenidae (Lyehyaena, Hyaenictis, Hyaena), of Muridse 

 (Acomys), of catarrhine monkeys (Mesopithecus). 



