FROM THE UPPER GREENSAND. 297 



Upper Greensand of Golden Cap, near Bridport, on the Dorsetshire coast, and the small 

 specimen from the Cowstones, Upper Greensand, at Black Ven, near Lyme Regis, Dorset, 

 and all the other British specimens on record were collected from the same beds on the 

 Dorset coast. It appears, however, to be a very rare form in that county. 



In France it is found in the Cenomanien at Havre, and at Grand-Pre, Meuse, and 

 Ardennes, in the same etage. 



The specimen in the Royal School of Mines, Jermyn Street, is from the Upper 

 Greensand- of the neighbourhood of Osmington, in Dorsetshire, where it was obtained by 

 Mr. E. H. Bunbury, who presented it to the Museum of that Institution. 



Cardiaster fossarius, Bcnett, 1831. PI. LXVIII, figs. 1 a — e. 



Spatanous rossABicrs, Benett. Catalogue of Upper Greensand Fossils, p. 7, 1831. 

 HoLASTER Greenoughii, Affossiz and Desor. Cat. Raisonee, p. 133, 1847. 

 MiCRASTER FOSSARIUS, Morris. Catalogue of Brit. Foss., p. 54, 1843. 

 Cardiaster — Forbes. Mem. Geol. Surv., decade iv, pi. ix, notes, 1852. 



— — Forbes. Morris's Catalogue, 2 ed., p. 73, 1854. 



— — D'Orbigny. Paleontologie Francaise, Ter. Cretace, tome vi, 



p. 124, pi. 820, 1855. 



Diagnosis. — Test large, cordiform ; length and width nearly equal, greatest diameter 

 at the anterior third ; deeply grooved at the anterior border, with prominent marginal 

 carinse, much elevated anteriorly and contracted posteriorly; the highest point of the test 

 behind the ambulacral summit ; posterior border truncated ; base slightly convex, with 

 an elevated ridge on the plastron, periprocte in the upper part of the border having a 

 blunt carina extending from its upper part to the disc ; test covered with very small 

 tubercles. 



Dimensions. — Antero-posterior diameter, 2 j^ inch ; transverse diameter, 2 ^-q inch ; 

 height, \^Q inch. This is the size of the large figured specimen. Smaller tests which I 

 have measured bear the same relation in their several diameters to each other as that 

 given for the type. 



Description. — This is the fine Wiltshire Cardiaster long ago mentioned in Miss 

 Benett's ' Catalogue of Wiltshire Fossils ' as Spatanous fossarius. A specimen of this 

 species was sent by Mr. Greenough to the Paris Museum, which was entered in Agassiz 

 and Desor's ' Catalogue Raisonne ' as Ilolaster Greenoughii. It has been long a leading 

 fossil Urchin in the Upper Greensand of Wilts, and appears to be special to that English 

 formation, as I have not found any specimen approaching this form from the Cenomanian 



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