W. A.  Herdman, ?Note on some points in the structure of the gill of the Ceylon pearl-oyster?, The Journal of the Linnean Society of London. Zoology, vol. 29, pp. 226-229, 1905.

W. A.  Herdman, ?Note on some points in the structure of the gill of the Ceylon pearl-oyster?, The Journal of the Linnean Society of London. Zoology, vol. 29, pp. 226-229, 1905.