Antelope

Boar
Augustus, denarius
Gallienus, Antoninianus for Legio I Italica

Bull
Augustus Aureus
Julian II, AE 2

Butterfly
Republican denarius, butterfly left of Head of Juno
 

Camel
Bacchius Judaeus, 55 BC (Dromedar)
Traian, Camel on drachm of ARABIA PETRAEA, Bostra

Capricorn

Cicada
Cicada behind head

Crocodile
Augustus Denarius

Dog
Roman Republican AE
and denarius
 

Dolphin (and Griffin)

 

Eagle
GalbaMarciana
Caracalla

Elephant

Goat on Philippus II sestertius

Griffin on Republican Denarius

 
 

Hippopotamus

Horse

Ibis

Lion
Antoninianus of Gallienus for the praetorian cohorts
Legio IIII Flavia

Mule

Panther

Peacock

Pegasos

Phoenix

Rabbit (to the right of Hispania)

Ram / Sheep
Carausius, Ram for Legio I Minerva

Raven

  quinar Marcus Antonius and Lepidus
 

Scorpion
Hadrian denarius

Snakes
Quinar of Augustus

Sphinx

Augustus Aureus
 

Storck
Gallienus Antoninianus

Swine, Sow

Wasp
Republican denarius, griffin jumping over wasp

Wolf

Zentaur
Gallienus Antoninianus
 

and finally Plants:

Flower on denarius of Augustus...