English: 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. Volume 3 Plate 51

1-5. Polyclinum aurantium M. Edw. (p. 2) 1. A cluster of colonies : natural size. 2. A cluster : x 2. 3. Individuals removed from their common envelope : magnified. 4. Part of a system showing a few branchial apertures and one common orifice : x 4. 5. A single colony : natural size (M. Edwards, pl. i, f. 6). accepted name Polyclinum aurantium Milne-Edwards, 1841

6. Polyclinum succineum Alder. (p. 4) A colony : slightly enlarged. accepted name Aplidium turbinatum (Savigny, 1816)

7 and 8. Polyclinum succineum var. subopacum var. nov. (p.5) A colony from Gouliot Caves, Sark : x 2. (P. subopacum of the authors, but not described by them.) accepted name Aplidium turbinatum (Savigny, 1816)

9-11. Polyclinum cerebriforme Alder, (p. 5) 9. A colony from Bantry Bay: slightly enlarged. 10 and 11. Clusters of colonies from Hastings : natural size. accepted name Polyclinum aurantium Milne-Edwards, 1841