Crossland, Cyril. (1924). Polychaeta of tropical East Africa, the Red Sea, and Cape Verde Islands collected by Cyril Crossland, and of the Maldive Archipelago collected by Professor Stanley, M.A., F.R.S. Proceedings of the Zoological Society of London. 94(1): 1-106.
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In 1904 the author was working out a collection made by him in Zanzibar and British East Africa (now Kenya Colony) while working for Sir Charles Eliot, G.C.M.G., F.Z.S., the High Commissioner. Finding that in the state of the literature at that time, certainty of discrimination of species would be assisted by a wider range for examination, and being particularly interested in comparing the faunas of the Atlantic and Indo-Pacific areas, he applied to the Carnegie Trustees, who provided funds for an expedition to the Cape Verde Islands. While there he was offered by Professor Herdman a post under the Sudan Government to examine the Pearl Fishery of the Red Sea, and has been engaged there since. This is the origin of the fourth (RedSea) collection.