44 



CIDARIS. 



D. Species from the Coralline Oolite. 



Cidaius florigemma, Phillips. PL II, fig. 2 a, b, c, d, e,f; PL VIII, fig. 4 a, b, c, d. 



" Lapides Judaici of Oxfordshire." Plott, Natural History of Oxfordshire, pi. 6, figs. 



8, 9, spines only, p. 125, 1677. 

 "Radiolus Echinit-E maximi laticlavii." Lhwydd (Luidius), Lithophylacii Brittanici 



Ichnographia, editio Altera Oxonii, 1760, t. 12, fig. 1002, p. 49. 

 Die naturgeschichte der Versteinerungen, Knorr II, i, t. e, figs. 4, 5 ; t. e, vi, fig. 9, 



1768. 

 " A globose mammillated Echinite from Oxfordshire." Parkinson, Organic Remains, 



pi. 1, fig. 9, and pi. 4, figs. 15 and 17, vol. hi, p. 13, 1811. 

 Cidarites Blumenbachii. Goldfuss, Petrefacta Gerraaniae, p. 117, t. 39, fig. 3 c, d, e 



(aculei non testa), 1820. 

 Cidaris florigemma. Phillips, Geology of Yorkshire, pi. 3, figs. 12 and 13, p. 127, 



1829. 



— — De la Beche, Geological Manual, 3d edition, p. 535, 1833. 

 Cidarites elongatus. Roemer, Die Versteinerungen des Norddeutschen Oolithen- 



Giberges, pi. 1, fig. 14, p. 27, 1836. 



— florigemma. Desmoulins, Etudes sur les Echinides, p. 338, No. 31, 1837. 



— — Agassiz, Prodromus Echinoderm., No. 31. 



Cidaris Blumenbachii. Id. Echinodermes Fossiles Suisse, part ii, t. 20, figs. 5, 6 



(non fig. 7), p. 56, 1840. 

 Cidarites Blumenbachii. Id. Catalogus systematicus ectyporum Echinodermatum Fos- 



silum, p. 10, 1840. 

 Cidarites Blumenbachii. Lamarck, Histoire Naturelle des Animaux sans Vertebres, 



2d edition, tome hi, p. 386, 1840. 

 Cidaris Blumenbachii. Morris, Catalogue of British Fossils, p. 49, 1st edit., 1843. 



— — Wright, Annals and Magazine of Natural History, 2d series, 



vol. viii, p. 248. 



— — Bronn, Lethsea Geognostica, 2d edition, p. 140, 1851. 



— — Cotteau, Etudes sur les Echinides Fossiles du departement 



de l'Yonne, pi. 10, figs. 7, 8 (non fig. 6), p. 108, 1852. 



— — Desor, Synopsis des Echinides Fossiles, t 3, fig. 14, p. 5, 1854. 



— florigemma. Morris, Catalogue of British Fossils, p. 74, 1854. 



— — Woodward, Memoirs of the Geological Survey, Decade V, 



Notes to Cidaris. 



Test round, much inflated at the sides, and depressed at both poles ; ambulacral areas 

 narrow, elevated, and sinuous, with two marginal rows of granules set on basal eminences* 

 and in the widest part of the area, two other rows of very small granules, without basal 

 eminences, the middle rows disappear at both ends of the areas : inter-ambulacral areas 

 wide, with two rows of primary tubercles, from six to seven in each column ; areolas rather 

 oblong, and surrounded by a prominent elevated scrobicular circle of well-spaced -out 

 granules, set on shield-like bases ; miliary zone wide, concave, and filled with several rows 



