134 CYPHOSOMA 



above, contracting below down to the oral opening, which, at first sight, appears to be the 

 summit of the test. In PL XXII, figs. 5 a, h, c, I have given drawings of a young test 

 from the National Collection. 



Affinities and Differences. — This species forms one of the most typical forms of the 

 genus Cyphosoma, well characterised by its large size, round and inflated at the 

 ambitus, highly ornamented at the base, and having the poriferous pores distinctly 

 bigeminal in all the upper part of the zones ; the secondary tubercles are large above the 

 ambitus and small at the base ; the spines are strong, elongated, and furnished with a 

 striated collar, having the summit sometimes flattened and carinatedj or expanded and 

 spatulate, as seen in the different figm^es. 



The nearest affinities of C. Konigi are with C. granulosum, from which it differs in 

 having large secondary tubercles above the ambitus and a more ornamented test at the 

 base. In size and height, and in the disposition of its tubercles on the upper surface, as 

 well as in the bigeminal arrangement of the pores in the upper part of the zones, it much 

 resembles C. magnificmn, Agass., from the Etage Senonien inferienre of the south-west 

 of France. 



Locality and Stratigraphical Position. — C. Konigi is found in fine preservation in the 

 Upper Chalk of Kent, Sussex, Norfolk, Wiltshire, and Yorkshire. In France it is col- 

 lected in the Etage Senonian at Thuison (Somme) ; Tartigny (Oise) ; Vernonnet, La 

 Villette, Hougouemarre (Eure) ; where it is rare. It is likewise found at Riigen, and 

 Csesfeld, near Dusseldorf. 



Cyphosoma corollare, Klein. PI. XXVI, figs. 7, 8, 9, 10. 



EcHiNiTES OEBICULATUS, Xwier. Ilist. Animal. Anglise, p. 220, pl.vii, fig. 19, 1678. 

 CiDARTS coKOLLARis, Klein. Natur. Dispos. Echinoderm., pi. viii, fig. c, p. 20, 



1734. 



— — Baier. Oryctographia Norica, p. 70, pi. iii, fig. 36, 1759. 



— — Leske. Klein, Nat. Dispos. Echinoderm., p. 138, pi. viii, 



fig. c, 1778. 



— coRONAiiis, Gmelin. Linne's System. Natur., p. 3177, 1788. 

 Echinus saxatilis, Parkinson. Organic Remains, pi. iii, fig. 1, 1811. 

 CiDARis COKOLLARIS, Parkinson. Ibid., pi. i, fig. 7, 1811. 



— SAXATILIS, Mantell. Geology of Sussex, p. ISO, 1822. 



— coROLLARis, Mantell. Ibid., p. 181, 1822. 



EcHiNDS SAXATILIS, Fleming. History of British Animals, p. 479, 1828. 



— — Brongniart. Tableau des Terrains, p. 40.5, 1829. 



— — JT'oodwarJ. Synop. Table of Brit. Org. Remains, p. 6, 1830. 



— — I)e Blainville. Zoophytes, Diet, des Sc. Nat., t. Is, p. 210, 



1830. 

 CiDARis COROLLARIS, Agassiz. Prodrome des Radiaires, p. 188, 1836. 

 Echinus coeollaris, Besmoulins. Etudes sur les Echinides, p. 298, 1837. 



