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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Hatch, P. | 1998 | Aquatic vegatation of Irish coastal lagoons | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Haynes, R.F. | 1953 | Collecting moths and butterflies in Connemara and N Mayo, June, 1952 | Journal | Ir. Nat. J. | Details... |
| Hayward, P.J., Matthews, B.E. & Wigham, G.D. | 1974 | The occurrence of Xantho incisus Leach (Crustacea: Decapoda) on the shores of the Mullet Peninsula, Co. Mayo | Journal | Ir. Nat. J. | Details... |
| Hely-Hutchinson, M. | 1950 | Probable Greenland falcon in Co. Mayo | Journal | Ir. Nat. J. | Details... |
| Heron-Allen, E. & Earland, A. | 1913 | Clare Island Survey: Foraminifera | Journal | Proc. Roy. Ir. Acad. | Details... |
| Hickson, S.J. | 1906 | The marine fauna of the west coast of Ireland. Miscellaneous notes. i.- Remarkable Coelenterata from the west coast of Ireland | Journal | Fish. Ir., Sci. Invest. | Details... |
| Hinch, J. de W. | 1911 | A high level deposit of marine shells in Curraun Achill, County Mayo | Journal | Ir. Nat. | Details... |
| Hinch, J. de W. | 1913 | The shelly drift of Glenulra and Belderrig, Co. Mayo | Journal | Ir. Nat. | Details... |
| Hinch, J. de W. | 1914 | Review 'The geology of Clare Island, Co. Mayo' by G.A.J. Cole, J.R. Kilroe, T. Hallissy & E.A. Newell Arber | Journal | Ir. Nat. | Details... |
| Holmes, J.M.C. & Minchin, D. | 1995 | Parasitic Copepoda associated with teleosts in Killary Harbour, Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Holt, E.W.L. | 1906 | The marine fauna of the west coast of Ireland. Miscellaneous notes. ii.- Branchellion torpedinis, Savigny | Journal | Fish. Ir., Sci. Invest. | Details... |
| Holyoak, D.T. & Long, D.G. | 2005 | Notable records of mosses (Bryopsida) from Co. Mayo, including four species new to Ireland | Journal | Ir. Nat. J. | Details... |
| Holyoak, G.A. | 2005 | Widespread occurrence of Vertigo geyeri (Gastropoda: Vertiginidae) in north and west Ireland | Journal | Ir. Nat. J. | Details... |
| Horsman, F. | 2005 | New records for Spiranthes romanzoffiana Cham. in S Kerry (H1), W Cork (H3), W Galway (H16), E Mayo (H26) and W Mayo (H27) | Journal | Ir. Nat. J. | Details... |
| Hoyle, W.E. | 1905 | The marine fauna of the west coast of Ireland. Part II(ii): On specimens of Tracheloteuthis and Cirroteuthis from deep water off the west coast of Ireland | Journal | Ann. Rept. Fish., Ireland | Details... |
| Hudson, H.J. | 1943 | Cephalanthera ensifolia in West Mayo | Journal | Ir. Nat. J. | Details... |
| Humphreys, G.R. | 1930 | Tree sparrow breeding on the Blackrock, Co. Mayo | Journal | Ir. Nat. J. | Details... |
| Humphreys, G.R. | 1944 | Black redstart in Co. Mayo | Journal | Ir. Nat. J. | Details... |
| Irish Whale and Dolphin Group | 1993 | Mayo Whale and Dolphin Survey 1993 Report | Report | | Details... |
| Jackson, R.D. | 1951 | Whooper swan in Co. Mayo in June | Journal | Ir. Nat. J. | Details... |
406 references found.