| Raja Sinha II and His British Captives | Reimers | Journal of the Royal Asiatic Society | 1925 | XXX | 78 | 13 - 36 | History |
| Rajasinghe-II of Senkadagala | Karalliyaade | Island | N/A | N/A | N/A | N/A | History |
| Rajovada: An Admonition to a King | Mudiyanse | Journal of the Royal Asiatic Society | 1972 | XVI New Series | N/A | 25 - 31 | History |
| Rakinawala | Katugaha | Loris | 1987 | XVII | 6 | 228 - 229 | General |
| Ralph Fitch and His Visit to Ceylon | Blaze | Journal of the D.B.U. | 1933 | XXII | 3 | 103 - 112 | General |
| Ramble in a Rare Region, A | Lewis | Journal of the D.B.U. | 1930 | XX | 1 | 12 - 19 | General |
| Rana Aurantica Boulenger Found in a Distinctive Locality - Rhumassala | Bahir | Loris | 1995 | XX | 5 | 207 | General |
| Random Notes on the Amphibians of the Kanneliya Jungles | Karunaratne | Loris | 1986 | XVII | 4 | 140 - 142 | General |
| Random Reminiscences of a Diver-Naturalist | De Silva | Loris | June 2009 | 25 | 3 | 24-36 | General |
| Range Extension of the Red-Throat Litter Skink | Goonatilaka | Loris | 1999 | 22 | 2 | 10 | General |
| Ransonnet - Beneath the Seas of Ceylon | Fernando | Tourists' Ceylon | 1970 | 3 | 3 | 5 - 9 | General |
| Raptor in the Bird Bath, A | | Siyoth | 2007 | 2 | 1 | 49 - 50 | Birds |
| Rare Mudra in Ceylon Images, A | Sirisoma | Ancient Ceylon | 1971 | 1 | N/A | 145 - 150 | Religion |
| Rare Snakes of Sri Lanka | De Silva | Loris | 1982 | XVI | 1 | 19 - 22 | General |
| Rasmus Rask & the Ceylonese Manuscripts at the Library of the Wesleyan Mission, Colombo in 1822 | Nordstrand | Journal of the Royal Asiatic Society | 1974 | XVIII New Series | N/A | 70 -73 | General |
| Rationale for Service Courses in English in Sri Lankan Universities | Fernando | University of Colombo Review | 1988 | 8 | N/A | 1 - 18 | General |
| Ratmalana Airport | N/A | Ceylon Today | 1958 | 7 | 10 | 17 - 20 | General |
| Ratnapura (Shivalik) Fossils of Ceylon, The | Deraniyagala | Spolia Zeylanica | 1955 | 27 | 2 | 223 - 225 | General |
| Ratnapura Fauna, The | Deraniyagala | Ancient Ceylon | 1971 | 1 | N/A | 11 - 22 | General |
| Re-Appraisal of Sri Lanka's Non Alignment: 1948-1960, A | Karunadasa | Journal of the Royal Asiatic Society | 1992/93 | XXXVII New Series | N/A | 69 - 81 | Politics |
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