Carter, H.J. (1884). On the
Spongia coriacea of Montagu ,=
Leucosolenia coriacea, Bk., together with a new variety of
Leucosolenia lacunosa, Bk., elucidating the spicular structure of some of the fossil CalcispongiƦ; followed by illustrations of the pin-like spicules on
Verticillites helvetica, De Loriol.
Journal of Natural History. 14 (79), 17-29.