22 CERNOHORSKY 
nutans, Maoritomella Powell, 1944, RAIM 3(1):39, pl.2, fig.15. Sth. Australia, Tertiary. 
nutans, Neoguraleus (Fusiguraleus) Powell, 1942, BAIM No.2:140, pl.7, fig.3. N.Z., Tertiary. 
oahuensis, Comitas Powell, 1969, IPM 2(10):270, pl.218. Hawaii, Recent. 
oamarutica, Etremopsis Powell, 1942, BAIM No.2:154, pl.9, fig.2. N.Z., Tertiary. 
obconica, Microvoluta Powell, 1952, RAIM 4(3):183, pl.36, fig.2. N.Z., Recent. 
obesa, Hochstetteria Powell, 1958, BANZARE 6(9):174, pl.1, figs.5,6. Antarctica, Recent. 
oblata, Lissotesta Powell, 1940, TRSNZ 70:221, pl.28, fig.13. N.Z., Recent. 
obliquata, Austronoba Powell, 1940, TRSNZ 70:224, p.30, fig.1. N.Z., Recent. 
obliquata, Benthocardiella Powell, 1930, TNZI 61:538, figs.4-6. N.Z., Recent. 
obsoleta, Margarella (Promargarita) tropidaphoroides Powell, 1951, DR 26:99, pl.5, fig.4. 
Sth. Georgia, Recent. 
obsoleta, Syntomodrillia Powell, 1944, RAIM 3(1):33, pl.2, fig.11. Victoria, Australia, 
Tertiary. 
obtusispira, Dardanula Powell, 1955, CEB No.15:88, pl.3, fig.23. N.Z., Recent. 
oconnori, Helicarion Powell, 1941, RAIM 2(5):263, pl.51, figs.3-5. N.Z., Recent. 
oconnori, Paryphanta lignaria Powell, 1938, RAIM 2(3):134, pl.33, figs.3-6. N.Z., Recent. 
oconnori, Phelussa Powell, 1941, RAIM 2(5):261, pl.51, figs.12,13. N.Z., Recent. 
oconnori, Phrixgnathus Powell, 1941, RAIM 2(5):261, pl.51, fig.11. N.Z., Recent. 
oconnori, Rhytida Powell, 1946, RAIM 3(2):130, pl.9, fig.10. N.Z., Tertiary. 
octocarinatus, Trichosirius Powell, 1931, RCM 3:376, pl.51, fig.5. N.Z., Recent. 
odhneri, Liracraea Powell, 1942, BAIM No.2:150, p15, fig.4. N.Z., Recent. 
odhneri, Specula Powell, 1927, RCM 3(2):117, pl.21, fig.10. N.Z., Recent. 
odhneri, Zeradina Powell, 1927, TNZI 58:297, pl.34, fig.1. N.Z., Recent. 
oliveri, Austronoba Powell, 1927, TNZI 57:542, pl.27, fig.9. Kermadec Is, Recent. 
oliveri, Cellana strigilis Powell, 1955, CEB No.15:73, pl.5, figs. 51-53. N.Z., Recent. 
oliveri, Limatula Powell, 1958, RAIM 5(1/2):71, pl.9, fig.4. Kermadec Is, Recent. 
oliveri, Subonoba Powell, 1955, CEB No.15:79, pl.2, fig.16. N.Z., Recent. 
oneroaensis, Acteon Powell & Bartrum, 1929, TNZI 60:442, pl.45, figs.77-79. N.Z., Tertiary. 
oneroaensis, Austrofusus (Neocola) Powell & Bartrum, 1929, TNZI 60:432, pl.35, figs.13,14. 
N.Z., Tertiary. 
oneroaensis, Cardium Powell, 1938, TRSNZ 68:367, pl.38, figs.7,8. N.Z., Tertiary. 
oneroaensis, Euspinacassis Powell, 1938, TRSNZ 68:374, pl.39, figs. 10,11. N.Z., Tertiary. 
oneroaensis, Isognomon Powell & Bartrum, 1929, TNZI 60:400, pl.44, fig.69; pl.49, fig. 106. 
N.Z., Tertiary. 
oneroaensis, “Macoma” Powell & Bartrum, 1929, TNZI 60:404, pl.42, fig.62. N.Z., Tertiary. 
oneroaensis, Polinices Powell & Bartrum, 1929, TNZI 60:425, pl.42, figs. 59-61, N.Z., Tertiary. 
opposita, Etremopsis Powell, 1944, RAIM 3(1):55, pl.5, fig.7. Victoria, Australia, Tertiary. 
OPTOTURRIS Powell, 1944, RAIM 3(1):12. Type species (OD) Pleurotoma optata Harris, 
1897. Victoria, Australia, Tertiary. 
opuraensis, Arca (Acar) Bartrum & Powell, 1928, TNZI 59:154, pl.26, fig.15, N.Z., Tertiary. 
opuraensis, Crypta Bartrum & Powell, 1928, TNZI 59:145, pl.27. fig.25. N.Z., Tertiary. 
opuraensis, Tugali Bartrum & Powell, 1928, TNZI 59:140, pl.27, fig.20. N.Z., Tertiary. 
orbicula, Benthocardiella Powell, 1930, TNZI 61:538, figs.1-3. N.Z., Recent. 
ormesi, Verconella Powell, 1927, TNZI 57:555, pl.29, figs.15-17. N.Z., Recent. 
ornata, Liarea Powell, 1954, RAIM 4(5):282, pl.48, fig.37. N.Z., Recent. 
ornata, Notoscrobs Powell, 1927, TNZI 57:548, pl.28, fig.19. N.Z., Recent. 
oruaensis, Neoguraleus Powell, 1942, BAIM No.2:137, pl.6, fig.7. N.Z., Recent. 
oshornei, Calliostoma Powell, 1926, TNZI 56:591, pl.103, figs.1,2. N.Z., Recent. 
otagoensis, Antiguraleus Powell, 1942, BAIM No.2:147, pl.8, fig.4. N.Z., Recent. 
otagoensis, Aoteadrillia Powell, 1942, BAIM No.2:89, pl.2, fig.8. N.Z., Recent. 
otagoensis, Cabestana (Cymatilesta) Powell, 1954, RAIM 4(4):236, pl.39, fig.1. N.Z., Recent. 
otagoensis, Cuna Powell, 1927, RCM 3(2):120, pl.23, figs.7,8. N.Z., Recent. 
otagoensis, Eulima Powell, 1927, RCM 3(2):119, pl.21, fig.6. N.Z., Recent. 
otagoensis, Euthrenopsis Powell, 1929, TNZI 60:89, pl.3, fig.57. N.Z., Recent, 
