54 



CIDARIS 



CiDARis scEPTRiFERA, Muntell. PI. V, figs. 16, 17; PI. VI; PI. VII, figs. 1, 2; PI. 



VII a, figs. 1, 3. 



CiDAKIS CUCUMERINA, 

 — SCEPTRIFERA, 



— CRETOSA, 



— VESICULOSA, 



— SCEPTRIFERA, 



Parkinson. Organic Remains, vol. iii, pi. iv, fig. 2, 1811. 

 Mantell. Geol. of Sussex, p. 194, pi. xvii, fig. 12 (spine), 



1822. 

 Agassiz. Catal. Syst. Ectyp. Foss., p. 10, 1840. 

 Ranter. Norddfiitscheu Kreidegebirge, p. 28, 1840. 

 Morris. Catalogue of Brit. Foss., p. 49, 1843. 

 Agassis et Desor. Catal. rais. des Echinides ; Ann. Sc. 



Nat., 3e ser., t. vi, p. 328, 1846. 

 Renss, pars. Versteinerungen der Bohmisclien Kreidefor- 



nialion, p. 57, pi. x.t, fig. 15, 1846. 

 Graves. Essai sur la Topogr. Geo), dii Dep. de I'Oise, 



p. 688, 1847. 



— — Bronn. Index Palaeontologicus, p. 298, 1848. 



— — d'Orbigny. Prod, de Pal. Strat., t. ii, p. 2/4, 1850 



— — Sorignet. Ours, de I'Eure, p. 6, 1850. 



— — Forbes, in Dixon, Geol. of Sussex, p. 338, pi. xxv, figs. 3 — 7, 



1850. 



— — Forbes, in Morris, Catal. of Brit. Foss., 2nd edit., p. 74, 1854. 



— — Desor. Synopsis des Echinides Foss., p. 13, pi. v, fig. 28, 



1855. 



— — Woodward. Mem. of the Geol. Survey, Dec. v, expl. to 



pi. V, fig. 12, 1856. 



— — Leymerie et Raulin. Stat. Geol. dii Depart, de TYoune, 



pp. 510—620, 1858. 



— — Coquand. Synops. des Foss. Form. Cret. du Sud-Ouest de 



la France; Bull. See. Geol., 2e ser., t. xvi, p. 1013, 

 1860. 



— — Cotteau et Triger. Ech. du Dep. de la Sarthe, p. 253, 



pi. xlii, figs. 1—8, 1860. 



— — Cotteau. Paleont. Fran9aise, p. 251, pi. 1056-57-58, 



1863. 



— — HupL Hist. Nat. Zooph. ; Eehinoderraes, p. 480, 1862. 



Test moderately large and inflated ; more or less elevated, and nearly equally flattened 

 at both poles ; ambulacral areas narrow, depressed, flexuous, with six rows of grannies in 

 the middle, diminishing to four rows above and below ; poriferous zones narrow, winding, 

 and depressed ; inter-ambnlacral areas wide ; plates very large, five to six in a column ; 

 areolae deep, circular, with an elevated, prominent, scrobicular margin, encircled by a 

 series of small granules, scarcely larger than those of the miliary zone ; boss not prominent, 

 summit feebly crenulated in young, and smooth in old shells; tubercle moderate in size 

 and perforated ; proximal discal plate in each column with a rudimentary tubercle, and an 

 elongated obsolete areola; miliary zone filled with small, equal-sized granules, much 



