346 EGHINOBRISSUS 



C. — Species from the Coralline Oolite. 

 EcHiNOBRissus scuTATTJs, LamaTck. PI. XXXVI, fig. 2 a, h, c, d, e,f. 



EcHiKiTES CORDATUS. Lang, Lapid. Figur. Helvetise, p. 119, tab. xxxv, fig. 1, 1708. 



EcHiNOBRissus ELATIOK. Breynius, Schediasma de Echinis, p. 63, tab. vi, fig. 3, 1732. 



Spatangus depkessus. Leske, Additamenta ad Kleinii Dispositionem Ecbinodermatum, 



p. 238, tab. li, figs. 1, 2, 1778. 



NuoLEOLiTES SCUTATU3. Lamarck, Syst. Animaux sans vert^bres, tome iii, p. 36, 1816. 



Clypeus cordatus. Smith, Strata Identified, plate of Coral Kag Fossils, 1817. 



Echinus depressus. Schlotheim, Petrefactenkunde, p. 313, 1822. 



Nucleolixes scutatus. Defrance, Diet, des Sciences Naturelles, tome xxxv, p. 21 3, 1825. 



— SCUTATA. Blainville, Diet, des Sciences Naturelles, tome xxxv,p. 213, 1825. 



— SCUTATUS. Deslongchamps, Encycloped. Method., ii, p. 570, No. 1. 



— — Goldfuss, Petrefacta Germanise, Band, i, tab. xliii, fig, 6 a — c, 



p. 140, 1826. 

 <-- — Desmoulins, Tableaux Synop. Echinides, p. 356, No. 5, 1836. 



— . — Agassiz, Echinodermes Foss. de la Suisse, p. 45, tab. vii, 



figs. 12—21, 1839. 



— CLUNicuLARis, var. a major. Forbes, Memoirs of the Geological Survey, 



decade 1st, pi. ix, 1849. 



— SCUTATUS. D'Orbigny, Prodrome de Paleontologie, tome i, p. 379, 1850. 



— — Bronn, Lethsea Geognostica, 3d Aufl. zweit. Band., p. 151, 



tab. xvii, fig. 13, 1851. 



— — Wright, Annals and Magazine of Nat. Hist., 2d series, vol. 13, 



p. 185, 1851. 



— DIMIDIATUS (pars) Wright, Annals and Magazine of Nat. Hist., 2d series, 



vol. ix, p. 301, 1851. 



— SCUTATUS. Forbes, in Morris's Catalogue of British Fossils, 2d ed., p. 84, 



1854. 

 ECHINOBRISSUS SCUTATUS. Desor, Synopsis des Echinides Foss., p. 277. 



Test elliptical, sub-quadrate, rounded before, enlarged, expanded, and bilobed behind ; 

 upper surface convex, more or less depressed ; sides tumid ; base concave ; apical 

 disc small, excentral, nearer the anterior border ; dorsal valley wide, with perpendicular 

 walls ; apex separated from the disc by an undepressed portion of test ; valley extending 

 about two thirds the distance between the vertex and border ; vent large and 

 elliptical ; base concave, much depressed at the excentral mouth-opening ; peristome 

 sUghtly pentagonal. 



Dimensions. — Height, seven tenths of an inch; antero-posterior diameter, one inch 

 and three tenths ; transverse diameter, one inch and a quarter. 



Description. — It is impossible to decide whether the urchin figured by Plot* in tab. 



* * History of Oxfordshire.' 



