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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Riordan, C.E. | 1984 | Marine fauna notes from the National Museum of Ireland - 9. | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1985 | Some observations on the occurrence of Galeodea rugosa (L.) off the Irish coast | Journal | Conch. Newsletter | Details... |
| O'Riordan, C.E. & Holmes, J.M.C. | 1978 | Marine fauna notes from the National Museum of Ireland V. - passengers on the North Atlantic currents | Journal | Ir. Nat. J. | Details... |
| O'Shaughnessy, A. & McGrath, D. | 1996 | The endoparasitic copepod Trochicola entericus (Dollfus, 1914), newly recorded in Irish waters | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, G. | 1983 | The intertidal fauna of Aughinish Island, Shannon, Co. Limerick | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, G. | 1989 | The 1987 Research Programme of the R.V. Lough Beltra: a year of progress | Chapter | | Details... |
| O'Sullivan, M.P., Nixon, E.R., McLaughlin, D., O'Sullivan, M.I. & O'Sullivan, D. | 1991 | Chemical contaminants in Irish estuarine and coastal waters, 1978 to 1988 | Journal | Fish. Bull. | Details... |
| Odhner, N.H. | 1921 | On some species of Pisidium in the Swedish State Museum | Journal | J. Conch. (Lond.) | Details... |
| Oldham, C. | 1904 | Vallonia eccentrica Sterki in Ireland | Journal | J. Conch. (Lond.) | Details... |
| Oldham, C. | 1913 | Vertigo alpestris Alder in Merionethshire | Journal | J. Conch. (Lond.) | Details... |
| Oldham, C. | 1932 | Mollusca and the Great Saltee | Journal | J. Conch. (Lond.) | Details... |
| Oldham, C. | 1935 | Notes on the snails of the Mullet, western Mayo | Journal | J. Conch. (Lond.) | Details... |
| Oldham, C. | 1938 | Ashfordia granulata (Alder) on Achill Island | Journal | J. Conch. (Lond.) | Details... |
| Oliver, G. | 1979 | Review: 'Living marine molluscs' by C.M. Yonge & T.E. Thompson | Journal | Ir. Nat. J. | Details... |
| Oliver, G.A. & Healy, B. | 1998 | Records of aquatic fauna from coastal lagoons in Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Orr, H.L. | 1899 | The dispersal of Mollusca etc. | Journal | Ir. Nat. | Details... |
| Orr, H.L. | 1902 | Vertigo edentula on furze bushes | Journal | Ir. Nat. | Details... |
| Ottway, B., Parker, M., McGrath, D. & Crowley, M. | 1979 | Observations on a bloom of Gyrodinium aureolum Hulbert on the south coast of Ireland, summer 1976, associated with mortalities of littoral and sub-littoral organisms | Journal | Ir. Fish. Invest. | Details... |
| Pack-Beresford, H.D. | 1948 | Mussel colony | Journal | Ir. Nat. J. | Details... |
| Palmer, C.P. | 1979 | An introduction to the Scaphopoda | Published | | Details... |
1505 references found.