M.  P Duncan, ?On the fossil corals (Madreporaria) of the West-Indian Islands, Part IV, Conclusions?, Quarterly Journal of the Geological Society of London, vol. 24, pp. 9?33, pl. 1?2, 1868.

M.  P Duncan, ?A monograph of the British fossil corals. Second series. Part IV, No. 2. Corals from the zone of Ammonites angulatus (continued). Corals from the zone of Ammonites bucklandi (bisulcatus), Ammonites obtusus, Sow., and Ammonites raricostatus, Ziet?, Monograph of the Palaeontographical Society, vol. 21, pp. 45?73, pl. 12?17, 1868.