1. Alder J, Hancock A. 1845–1855. A monograph of the British Nudibranchiate Mollusca: with figures of all the species. Ray Society, London. Dates of Publication: part 1, fam. 1 (plates 4–5, 26), fam. 3 (plates 3, 21, 24, 26, 34–36) [1845]; part 2, fam. 1 (plates 10, 13, 18, 23), fam. 3 (plates 1–2, 4, 6, 12, 15, 23, 30, 42) [1845]; part 3, fam. 1 (plates 6, 8, 19, 25), fam. 2 (pl. 3), fam 3 (plates 1a, 7, 19, 28, 31, 33) [1846]; part 4, fam. 1 (plates 7, 14, 20, 21, 24), fam. 2 (pl. 5), fam. 3 (plates 11, 13–14, 20, 25, 40) [1848]; part 5, fam. 1 (plates 1–2, 12, 15–16, 22), fam. 2 (pl. 4), fam. 3 (plates 5, 16–17, 27, 37, 39, 43) [1851]; part 6, fam. 1 (plates 3, 9, 11, 17), fam. 3 (plates 9–10, 18, 22, 29, 32, 41, 44) [1854]; part 7, fam. 1 (plates 21a, 27), fam. 2 (plates 1–2), fam. 3 (plates 38a, 45–48), appendix. 1–54, i–xl [1855]
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