Muellerisphaerids are described and illustrated from Britain for the first time. The mechanical processing method used in their extraction is described. They are preserved as pyrite internal moulds and thus lack the necessary morphological detail (i.e. spines) to be identified to family level. Other microfossils occurring in the samples are also recorded.
- Received April 1, 1988.
- Revision received July 1, 1988.
- © 1988 The Micropalaeontological Society