THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE II. VOL. IX. 



No. XII.— DECEMBER, 1882. 



I. — Notes on Oueaster bulbiferus, Forbes, from the Upper 



Chalk, Bromley, Kent. 



By P. Herbert Carpenter, M.A. 



(PLATE XII.) 



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. 



Seven species of Chalk Star-fishes, viz. six from the Upper 

 Chalk of Kent, Sussex, and Wiltshire, and one from the Lower 

 Chalk of Sussex and Kent, are referred by Forbes to the genus 

 Oreaster of Miiller and Troschel. Most of these were only known 

 to him by very imperfect specimens : it seems, therefore, desirable 

 to refigure any which may have since been obtained in a more perfect 

 state. 



The following list, taken from Morris's Catalogue, gives the 

 genera and species hitherto figured and described from the English 

 Chalk and Greensand : — 



I. Arthraster, Forbes, 1850. 



1. Dixoni, Forbes, Mem. Geol. Stirv, Decade 2, p. 467; Dixon, Fossils 

 Sussex, p. 336, t. 23, fig. 1. U. Chalk, Kent ; 

 Sussex. 

 II. GoNiASTER, Agassiz, 1834. 



Subgenera, (A.) Astrogonium, Miiller. 

 (B.) Goniodiscus, Miiller. 

 (C.) Stellaster, MiiUer. 

 (A.) Astrogonium 1. angustattis, Forbes, M.G.S. 2, p. 474 ; Dixon, Foss. Sussex, 

 335, t. 23, f. 10. U. Chalk, Kent; Siissex. 



2. Coombii, Forbes, M.G.S. 2, p. 474; Dixon, Foss. Sussex, 334, 



t. 23, f. 6. L. Chalk, Amberley, Sussex. 



3. latus, Forbes, M.G.S. 2, p. 474 ; Dixon, Foss. Sussex, 333, 



t. 23, f. 4, 5, L. Chalk, Amberley, Sussex. 



4. lunatus, Wooiward, sp. ; Forbes, M.G.S. 2, p. 474; Dixon, 



Foss. Sussex, t. 23, f. 7 ; Asterias, Woodw. Geol. 

 Norf. t. 5, f. 1. U. Chalk, Norfolk; Kent; Sussex; 

 Wiltshii-e. 



DECADE II. — VOL. IX.— NO. XII. 34 



