XLVI.—On a true Leuconid Calcisponge from the Middle Lias of Northamptonshire, and on detached Calcisponge spicules in the Upper Chalk of Surrey
- 1 November 1889
- journal article
- Published by Taylor & Francis in Annals and Magazine of Natural History
- Vol. 4 (23) , 352-358
- https://doi.org/10.1080/00222938909460539