W. A.  Herdman, ?Report on the Tunicata collected during the voyage of H.M.S. Challenger during the years 1873-1876. part 1. Ascidiae simplices.?, Zoological Report on the Challenger Expedition, vol. 6, pp. 1-296, 1882.

W. A.  Herdman, ?Notes on British Tunicata with Descriptions of New Species. I. Ascidiidae?, Journal of the Linnean Society of London, vol. 15, 1881.

W. A.  Herdman, ?Preliminary report of the Tunicate of the "Challenger" expedition, part IV. Molgulidae?, Proceedings of the Royal Society of Edinburg, Sess. 1880-81, vol. 11, pp. 233-240, 1881.

W. A.  Herdman, ?Preliminary report on the Tunicata of the Challenger Expedition. Part III. Cynthiidae?, Proceedings of the Royal Society of Edinburgh, vol. 11(3), pp. 52-88, 1881.

W. A.  Herdman, ?Preliminary report on the Tunicata of the Challenger Expedition?, Proceedings of the Royal Society of Edenburgh, vol. 10(1), pp. 458-472, 1880.

W. A.  Herdman, ?Tunicata?, In Report on the collections of natural history made in the Antarctic regions during the voyage of the Southern Cross (British Museum Natural History) & E.R. Lankester. London, vol. 6, pp. 190-200, 1902.

W. A.  Herdman, ?Note on the Tunicata fauna of Australian seas?, Annals and Magazine of Natural History, vol. 7, pp. 443-450, 1898.

W. A.  Herdman, ?A revised classification of the Tunicata with definition of the orders, suborders, families, subfamilies, and genera and analytical keys to the species?, Journal of the Linnean Society of London. Zoology, vol. 23, pp. 558-652, 1891.

W. A.  Herdman, ?On the genus Ecteinascidia and its relations; with descriptions of two new species, and a classification of the family Clavelinidae?, Proceedings and transactions of the Liverpool Biological Society, vol. 5, pp. 144-163, 1890.

W. A.  Herdman, ?Report on the Tunicata collected during the Voyage of H.M.S. Challenger during the years 1873-1876. Part III APP. A. Description of two new species of simple ascidians?, Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876, vol. 27, pp. 151-154, 1888.

W. A.  Herdman, ?Report on the Tunicata collected during the years 1873-1876, Part 2: Ascidiae Compositae?, Zoological Report on the Challenger Expedition, vol. 14, pp. 1-429, 1886.

W. A.  Herdman, ?Report upon the Tunicata dredged during the cruises of H.M.S. ?Porcupine? and ?Lightning? in the summer of 1868 and 1870?, Transactions of the Royal Society of Edinburgh, vol. 32, pp. 219-231, 1884.

W. A.  Herdman, ?Report on the Tunicata?, Ceylon Pearl Oyster Fisheries Supplement Report, vol. 39, pp. 295-348, 1906.