Alder J. (1838). "Supplement to a catalogue of the land and fresh-water testaceous Mollusca, found in the vicinity of Newcastle". Transactions of the Natural History Society of Northumberland and Durham1(3): 337-342. Newcastle.
Alder J. & Hancock A. (1845-1855). A monograph of the British nudibranchiate Mollusca: with figures of all the species. The Ray Society, London. Published in 8 parts:
Alder J. & Hancock A. (October 1851). "Descriptions of two new species of nudibranchiate Mollusca, one of them forming the type of a new genus". [[Journal of Natural History|Annals and Magazine of Natural
Alder, Joshua, Embleton, Dennis, Hancock, Albany, Hopkinson, John,Norman, Alfred Merle, 1905-12 The British Tunicata; an unfinished monograph, by the late Joshua Alder and the late Albany Hancock. Edited by John Hopkinson, with a history of the work by the Rev. A. M. Norman. London. Printed for the Ray Society.