Icuncula consobrina (cousin cap-shell)
Icuncula torcularis (wine-press cap-shell)
Idiosepius notoides (southern pygmy-squid)
Incisura remota (remote slit-shell)
Inella obliqua (oblique sinistral-creeper)
Inella spina (thorn sinistral-creeper)
Inquisitor radulaeformis (scraping-iron turrid)
Irus carditoides (cardita-like boring-venus)
Irus crebrelamellatus (flacky boring-venus)
Irus crenatus (scaly boring-venus)
Irus cumingii (Cuming’s boring-venus)
Irus griseus (Tasmanian boring-venus)
Ischnochiton australis (southern chiton)
Ischnochiton carinulatus (keeled chiton)
Ischnochiton cariosus (decayed chiton)
Ischnochiton contractus (shortened chiton)
Ischnochiton elongatus elongatus (lengthened chiton)
Ischnochiton falcatus (sickle-shaped chiton)
Ischnochiton fruticosus (fruity chiton)
Ischnochiton lentiginosus (pigmented chiton)
Ischnochiton lineolatus (lined chiton)
Ischnochiton mawlei (Mawle’s chiton)
Ischnochiton mayi (May’s chiton)
Ischnochiton smaragdinus (emerald chiton)
Ischnochiton subviridis (greenish chiton)
Ischnochiton torri (Torr’s chiton)
Ischnochiton variegatus (variegated chiton)
Ischnochiton versicolor (variably-coloured chiton)
Ischnochiton virgatus (striped chiton)
Isotriphora amethystina (amethyst sinistral-creeper)
Isotriphora disjuncta (disjunct sinistral-creeper)
Isotriphora nivea (snowy sinistral-creeper)
Isotriphora simulata (fake sinistral-creeper)
Isotriphora tasmanica (Tasmanian sinistral-creeper)
Isotriphora vercoi (Verco’s sinistral-creeper)