The two Star-fishes represented in our Plate form part of a group of six specimens found associated together in the same mass of Chalk at Bromley, Kent, by the late well-known collector, Jeremiah Simmons, of whose persevering and successful labours in obtaining fossils from the Chalk formation abundant evidence may be seen in the beautiful series of Echinodermata in the cases of the British Museum of Natural History, some of which formed a part of the Dixon and Bowerbank Collections. He also collected for the Marquis of Northampton, and a fine Collection of Chalk Fossils made by Simmons is now preserved in the Woodwardian Museum at Cambridge.