46 



On Palceodiscus and Agelacrinus. 



LITERATURE. 



1. Bather. 1898-99. " Studies in Edrioasteroidea." ' Geol. Mag.,' N.S., 



dec. IV, vol. 5, 6. 



1901. " What is an Echinoderin ? " ' J. London Coll. Soc.,' vol. 8. 

 1900. "A Treatise on Zoology, Part III, The Echinoderma." 



2. Billings, E. 1858. (" On the Cystide of the Lower Silurian Rocks of 



Canada.") 'Canadian Organic Remains,' dec. Ill, 

 pp. 9, 74. 



3. Forbes, E. 1848. ("On the Cystidese of the Silurian Rocks of the British 



Islands.") ' Mem. Greol. Surv., Great Brit.,' vol. 2, Part 2. 



4. Giesbrecht, W. 1880. " Der feinere Bau der Seeigelzahne." ' Morph. 



Jahrbuch,' vol. 6. 



5. Gregory. 1897. " On Echinocystis and Palaeodiscus." ' Quart. Jour. Geol. 



Soc.,' vol. 53, pp. 123-136. 



6. Hseckel. 1896, "Die Amphorideen und Cystoideen, etc." ' Festschr. fur 



Gegenbaur,' No. 1. 



7. Hall. 1847, 1852, 1859. ' Paleontology of New York, vol. 1, 2, 3, in Natural 



History of New York.' 



1858. ' Report on the Geological Survey of the State of Iowa, vol. 1, 

 Part II, Palaeontology.' 



8. Jaekel, O. 1899. ' Stammesgeschichte der Pelmatozoen,' vol. 1. 



9. Jackson, R. T. 1896. "Studies of Palseechinoidea." 'Bull. Geol. Soc. 



Amer.,' vol. 7 3 pp. 171, 246. 



10. Lang. 1896. ' Text Book of Comp. Anat.,' English Translation, vol. 2, p. 355. 



11. Loven. 1892. ' Echinologica Bihang. Svensk. Yet. Akad. Hand.,' vol. 18, 



Afd. I Y, No. 1. 



12. MacBride. 1903. "The Development of Echinus Esculentus." 'Phil. 



Trans.,' Series B, vol. 195, pp. 285327. 



13. Meek, F. B. 1873. ' Ohio Pal.,' vol. 2. 



14. Miller and Faber. 189293. ' Cincin. Soc. Nat. Hist. Journ.,' vol. 15. 





15. Miiller, Joh. 1854. " Ueber den Bau der Echinodermen." ' Abhand. d. 



Kgl. Akad. d. Wissensch., Berlin.' 



16. Neumayr, M. 1881. " Morphologische Studien fiber fossile Echinodermen." 



' Sitz. Ber. d.k.k. Akad. d. Wiss. in Wien,' vol. 84. 

 1889. ' Die Stamme des Thierreiches,' vol. 1. 



" Beitrage zur Kenntniss der Fossilen Fauna des Devonischen 

 Gebirges am Rhein." 'Yerh. d. Natur. Hist. Yer. f . 

 Rheinlande und Westfalen,' vol. 8, p. 372. 

 (" On some New Palaeozoic Starfishes.") ' Ann. Mag. Nat. 



Hist.,' Ser. 2, vol. 20. 



Schmidt, F. B. von. 1874. " Ueber einige neue und wenig bekannte Baltisch- 



Silurische Petrefacten." Mem. Acad. Imp. 

 Sci.,' St. Petersburg (7), vol. 21, pp. 34 and 35. 

 Sollas, W. J. 1889. " On Silurian Echmoidea and Ophiuroidea." ' Quart. 



Journ. Geol. Soc.,' vol. 45, 1889, pp. 692715. 

 1903. ' Phil. Trans.,' Series B, vol. 196. 

 Sowerby, G. B. ' Zoological Journal,' vol. 2. 



Thomson, C. Wyville. 1881. (" On a new Paleozoic Group of Echinoder- 



mata.") ' Edin. New Phil. Journ.,' N.S., 

 vol. 13, pp. 106117. 



Wright. ' British Fossil Echinodennata of the Oolitic Formations," vol. 2 ; 

 " The Asteroidea and Ophiuroidea." ' Palseontogr. Soc.,' 1863 1880. 

 Zittel, K. A. 1879. ' Handbuch der Palaontologie, 1. Band, Palseozoologie.' 



17. Roemer. 1851. 



18. Salter. 1857. 

 19. 



20. 



21. 

 22. 



23. 

 24. 



