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1840. On Cyrloma a new genus of fossil Echinida. Calcutta Journ. Nat. 

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 McCkady, J. 



1859. Remarks on the Eocene formation in the neighborhood of Alligator, 

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 Melvilxe, R. V. 



1952. On a new species of irregular echinoid (Plagiochasnia coxwellense 

 sp. nov.) from the Lower Greensand of Faringdon, Berks. Bull. 

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MiCHELIN, HarDOUIN. 



1850. Notice sur deux especes d'echinides fossiles. Rev, et Mag. Zool., 

 ser. 2, vol. 2, pp. 240, 241. 

 Millet, P, A. 



1854. Paleontologie de Maine-et-Loire. 



1865. Indicateur de Maine-et-Loire, vol. 2, 616 pp. 



MORTENSEN, T. 



1922. Echinoderms of New Zealand and the Auckland-Campbell Islands. 



Vid. Medd. Nat. Forsch., vol. 73, pp. 139-198, pis. 6-8. 

 1948. A monograph of the Echinoidea, vol. 4. pt. i, Holectypoida, Cassidu- 



loida. 371 pp., 14 pis., 326 text figs. Copenhagen. 

 Morton, S. G. 



1834. Synopsis of the organic remains of the Cretaceous group of the 



United States. 88 pp., 19 pis. Philadelphia. Reprinted from Amer. 



Journ. Sci., vols. 17, 18, 1830. 

 Munier-Chalmas, E. 



1882. In Hebert, Sur le groupe nummulitique du midi de la France. Bull. 



Soc. Geol. France, ser. 3, vol. 10, p. 369 (genre Oriolampas) . 



Neave, S. a, 



1939. Nomenclator Zoologicus, vol, i, 957 pp. Published by the Zoological 

 Society of London. 

 Nichols, D. 



1959. Changes in the Chalk heart-urchin Micraster interpreted in relation 

 to living forms. Philos. Trans. Roy. Soc. London, vol. 242, pp. 347- 

 437, I pl-, 46 figs., 13 tables, 

 Orbignv, Alcide d'. 



1854-1860, fichinoides irreguliers: Paleontologie francaise, terrain Cretace, 

 ser. I, vol. 6, 596 pp., pis. 801-1006, (Completed by G. Cotteau.) 



Penecke, K. a. 



1885. Das Eocan des Krappfeldes in Kapten. Sitzungsb. Kais. Akad. Wiss,, 

 vol. 90, pp. Z27-Z71. 

 Petitot, M. L, 



1954. Sur une nouvelle espece d'echinide irregulier du Maroc: Pseudo- 

 py gurus ambroggii nov. sp. Notes Serv. Mines Maroc, vol. 121, 

 pp. 83-87, I pi., 2 figs. 



POMEL, N. A. 



1869. Revue des echinodermes et de leur classification pour servir d'intro- 

 duction a I'etude des fossiles. Paris. 



