
Part IV. Sect.i.§ 1.] EOCENE. 841 
of the tribe of monkeys. With the upper Eocene period, besides 
the abundant older tapir-like forms, there came others (Anchi- 
thertum), which presented characters intermediate between those 
of the tapiroid Paleotheres and the true Equide. They were 
about the size of small ponies, had three toes on each foot, and are 
regarded as ancestors of the horse. Numerous hog-like animals 
(Microchzrus, Diplopus, Hyopotamus) mingled with herds of ancestral 

Fic. 403.—EocrenrE GASTEROPODS. 
a, Fusus longevus (Brand.) (3); 6. Cerithium giganteum (Desh.) (4); ¢, Melania inquinata 
(Sow.) @); d, Voluta elevata (Sow.) (3); e, Rostellaria fissurella (Desh.) (2); 7, Conus 
deperditus (Brug.) (3). 
hornless forms of deer and antelopes (Dichobune, Dichodon, Amphi- 
tragulus). Opossums abounded. Among the carnivores were 
animals resembling wolves (Cynodon), foxes (Anphicyon), and wolve- 
rines (Tylodon), but all possessing marsupial affinities. ‘There appear 
to have been also representatives of our hedge-hogs, squirrels, and 
bats." 
1 Gaudry, Les Enchainements du Monde Animal, p.4. Boyd Dawkins, Early Man in 
Britain, chap. li. 
