346 ECHINOBRISSUS 



C. — Species from the Coralline Oolite. 

 EcHiNOBRissus scuTATUs, Lamavck. PI. XXXVT, fig. 2 a, b, c, d, e,f. 



EcHiNiTES coRDATUS. Lang, Lapid. Figur. Helvetiae, p. 119, tab. xxxv, fig. 1, 1708. 



EcHiNOBRissus ELATIOK. Brcytiius, Scliediasma de Echinis, p. 63, tab. vi, fig. 3, 1732. 



Spatangus depressus. Leske, Additamenta ad KleiniiDispositionem Echinodermatum, 



p. 238, tab. li, figs. 1, 2, 1/78. 



NucLEOLiTES SCUTATUS. Lamarck, Syst. Animaux sans vertebres, tome iii, p. 36, 1816. 



Clypeus CORDATUS. Smith, Strata Identified, plate of Coral Rag Fossils, 1817. 



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



NucLEOLiTES SCUTATUS. Defrance, Diet, des Sciences Naturelles, tomexxxv, p. 213, 1825. 



— scuTATA. Blainville, Diet, des Sciences Naturelles, tomexxxv.p. 213, 1825. 



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



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



p. 140, 1826. 



— — Desraoulins, 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. Baud., 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 

 slightly 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.' 



