OG 



PSEUDODIADEMA 



c. — Species from the Upper Greensand. 



PsEUDODiADEMA Rhodani, Agassiz. PI. XVIII, figs. 3 a — e. 



DiADEMA Rhodani, 



LucjE, 

 Rhodani, 



Luc^, 



Rhodani, 



LucjE, 



Rhodani, 



Rhodani, 



PSEUDODIADEMA LUC^, 



Desor. 



— Rhodani, 



Desor. 



DiADEMA 



Pictet. 



— LUCTE, 



Pictet 



— Desoki, 



Forbes 



— PUSTULATUM, 



PSEUDODIADEMA LuCvE, 



Agassi:. Cat. Syst. Ectyp. foss., Miis. Neoc, Supplement, 



1840. 

 Agassic. Idem, Mtis. Neoc, p. 8. 

 Agassis. Desc. des Echinid. foss. de la Suisse, torn, ii, 



p. 9, pi. xvi, figs. 16—18, 1840. 

 Agassiz. Idem, p. 8, pi. xvi, figs. 11 — 15, 1840. 

 Agassis and Desor. Cat. Raison. des Ecliinid., Ann. des 



Science Nat., 3" ser., t. vi, p. 346, 1846. 

 Agassi: and Desor. Idem. 

 Bronn. Index Paleeontologicus, p. 418, 1848. 

 Bronn. Idem, p. 419. 



A/bin Gras. Oursin. foss. de I'lsere, p. 33, 1848. 

 D'Orbigny. Prodrome de Paleontol. strat., t. ii, p. 142, 



Et. 19, 1850. 

 Renevier. Mem. Geol. sur la Perte du Rhone, p. 49, 



1853. 

 Morris. Catalogue of British Fossils, 2nd ed., p. 70, 1854. 

 McCoy, Mesozoic Radiata, p. 6", 1854. 



Synopsis des Echinides fossiles, p. 71, 1855. 

 Idem, p. 71. 



Traite de Paleontol., 2' ed., t. iv, p. 244, 1857. 

 Idem. 



Notes by S. P. Woodward ; Memoirs of the Geol. 

 Surv., Decade V, p. 8, 1856. 

 Forbes. Idem, p. 8, 1856. 



Dujardin et Ilupe. Hist. Nat. des Zoophytes, Echino- 

 dermes, p. 498, 1862. 

 Rhodani, Dujardin et Hupe. Idem. 

 — Colteau. Paleontol. Franraise, Terrain Cretace, p. 460, 



pi. 1110, 1864. 



Diagnosis.— Test circular, depressed, slightly convex above, very concave beneath, 

 a little inflated at the angles ; ambulacral areas with two complete rows of tubercles, 

 fourteen to fifteen in each, and three incomplete rows of small secondary tubercles at the 

 base, five or six in each ; inter-ambulacral areas with two rows of primary tubercles, thirteen 

 or fourteen in each, and four rows of small unequal secondary tubercles at the base; 

 primary tubercles large at the ambitus, suddenly diminishing in size in both areas on the 



