@article {Duncan1886,
	title = {On the structure and classificatory position of some Madreporaria from the secondary strata of England and south Wales},
	journal = {Quarterly Journal of the Geological Society},
	volume = {42},
	year = {1886},
	pages = {113{\textendash}142},
	url = {http://dx.doi.org/10.1144/GSL.JGS.1886.042.01-04.16},
	author = {Duncan, P Martin}
}
@article {Duncan1886a,
	title = {On the Astrocoeni{\ae} of the Sutton Stone and other deposits of the Infra-lias of south Wales},
	journal = {Quarterly Journal of the Geological Society},
	volume = {42},
	year = {1886},
	pages = {101{\textendash}112},
	url = {http://dx.doi.org/10.1144/GSL.JGS.1886.042.01-04.15},
	author = {Duncan, P Martin}
}
