Camaena contractiva (J.F. Mabille, 1889) China, Guangxi province46 mm
Amphidromus contrarius (O.F. Müller, 1774) Indonesia, Timor38,1 mm
Amphidromus contrarius concolour E.C. Von Martens Indonesia, Timor47 mm
Amphidromus contrarius hanieli B. Rensch, 1931 Indonesia, Timor41,4 mm
Amphidromus contrarius nikiensis B. Rensch, 1931 Indonesia, Java40,4 mm
Amphidromus contrarius suspectus (E.C. Von Martens, 1864) Indonesia30,8 mm
Rhagada convicta (J.C. Cox, 1870) Australia, Leopold Range19 mm
Sphaerospira cookensis (J.W. Brazier, 1875) Australia, Haughton River
Sinumelon cooperi B.C. Cotton, 1940 Australia
Chloritis cordieri A.R.J.B. Bavay& P. Dautzenberg, 1909 Vietnam, Pac-Kha11,1 mm
Badistes corneovirens (L. Pfeiffer, 1851) New South Wales
Badistes corneovirens minor J.C.H. Crosse, 1864 Vietnam
Planispira cornicula J.B. Hombron& C.H. Jacquinot, 1842 Papua New Guinea28 mm
Nanotrachia coronata F. Köhler & F. Criscione,2013
Retroterra costa G.A. Solem, 1985 Australia, Ningbing Ranges
Amphidromus costifer E.A. Smith, 1895 Central Vietnam
Eurytrachia costulata J. Stanisic& D.G. Potter, 2010 Australia, Queensland, Broken river7,5 mm
Nanotrachia costulata F. Köhler & F. Criscione,2013
Turgenitubulus costus G.A. Solem, 1981 Australia, Ningbing Ranges13 mm
Basedowena cottoni T. Iredale, 1937 South Australia
Ganesella coudeini A.R.J.B. Bavay& P. Dautzenberg, 1900 Vietnam, Bac-Khan7,5 mm
Gloreugenia coxeni (J.C. Cox, 1871) Australia, North Queensland38 mm
Thersites coxi J.C.H. Crosse, 1866 Australia, Five Mile Creek38 mm
Papuina coxiana G.F. Angas, 1867 Papua New Guinea
Trachia crassicostata (W.H. Benson) India, Western Ghats
Australocosmica crassicostata F. Criscione & F. Köhler,2013
Chloritis crassula R.A. Philippi, 1844 Indonesia, West Java15 mm
Kimberleytrachia crawfordi (G.A. Solem, 1979) Australia, Saint Andrew Island
Arnemelassa creedi (J.C. Cox, 1868) Australia, Arnhem
Labyrinthus creveauxianus (C.M.F. Ancey, 1890)
Polydontes crispata (A.E.J. Férussac, 1821) Dominican Republic24 mm
Satsuma cristata H.A. Pilsbry, 1902 Japan, Wakayama
Thersites croftoni (J.C. Cox, 1872) Australia, Proserpine35 mm
Kimberleytrachia crucis F. Köhler, 2011 Australia, Jungulu Island
Calycia crystallina (L.A. Reeve, 1848) Papua New Guinea50 mm