FROM THE GREY CHALK. 103 



Catopygus carinatus, and the other species of this zone. It has been collected from the 

 same beds at Durdle Cove, on the Coast of Dorset. 



Foreign Distribution. — M. Desor states that P. Benettice is found in the Craie 

 chloritee (Cenomanien) of Villers-sur-Mer, Vaches-noires, de Gace, Orne, and is common 

 in all French collections. 



D. Species from the Grey Chalk. 



PSEUDODIADEMA ORNATUM, Goldf., Sp. PI. XVI, figS. 4 a 6; PI, XIX, flgS. 1 a C; PI. 



XXI, figs. 1 a—d, 2 ; PI. XXI a, figs. I a, b. 



CiDABiTES OBNATUS, Gold/uss. Petref. Germauise, tab.xl, fig. 10, p. 123, 1826. 



DiADEMA ORNATUM, Agassiz. Prod. d'une Monogr. des Radiares, Mem. Soc. 



des Sc. Nat. de Neufchatel, t. i, p. 118, 1836. 



— — Desmoulins. Etudes sur les Echinides, p. 314, No. 15, 1837. 



— — Dujardin. InLamarck's Anim. sans Vertebres, 2'ed., t. iii, 



p. 392, 1840. 



— — Roemer. Norddeutschen Kreidegebirges, p. 29, 1840. 



— — Agassiz et Desor. Catalogue raison. des Echinides, Ann. 



Sc. Nat., 2" ser., t. vi, p. 347, 1846. 



— — Bronn. Index Palseont., p. 449, 1848. 



— — jyOrhigny. Prod, de Paleont. strat., t. ii, p. 169, Et. 20, 



No. 560, 1850. 



— — Forbes. In Morris's British Fossils, 2nd ed., p. 77, 1854. 



— — McCoy. Contributions to Brit. Palaeontology, p. 67, 1854. 



— — Desor. Synopsis des Ecbinides fossiles, p. 72, 1856. 



— — Woodward. Mem. of Geol. Surv., Decade V, p. 7, 1856. 



— TUMiDUM, Woodward. Mem. Geol. Surv., Decade V, 1856. 



— CARTERI, Woodward. Ibid. 



PsEUDODiADEMA ORNATUM, Pictet. Traitc de Paleontol., 2" ed., t. iv, p. 245, 1857. 



— — Dujardin et Hupe. Hist. Nat. des Zoophytes, Ecbinod., 



p. 499, 1862. 



— — Cotteau. Paleontologie rrau9aise. Terrain Cretace, pi. 1115, 



tom. ii, p. 480, 1864. 



Test circular, inflated ; ambulacral areas straight ; tubercles small, numerous, sub- 

 equal, in. two rows, separated by a double series of granules; inter-ambulacral areas 

 with two rows of tubercles, separated by four rows of granules at the ambitus, which 

 disappear at the upper surface, and leave a smooth depressed space in the middle of the 

 miliary zone, bordered by two rows of granules ; between the tubercles and poriferous 

 zones a row of secondary tubercles extends from the peristome to near the disc, consisting 

 of small well-spaced-out tubercles, each surrounded by a circle of granules. Areolas cir- 

 cular, many of them radiated ; tubercles of both areas nearly equal in size. 



Dimensions. — Height half an inch ; transverse diameter one inch and two tenths. 



