6 



1868. De Rouville. Compte rendu <le la course á Roujan-Cabriěres. Bull. Soc. géol. de France. Ser. II. 



T. 25. 1868. p. 959. etc. 100 



W. Carruthers. Revision of British Graptolitidae. Geol. Mag. Vol. V. Nr. 44. et 45. 101 



H. A. Nichólson. The Graptolites of the Skiddaw-Series. Quart. Journ. Geol. Soc. Vol. 24. p. 125. 102 



— On the Graptolites of the Coniston-Flags with notes on the British species of the genus 



Graptolites. Quart. Journ. Geol. Sol. Vol. 24. p. 521. 103 



R. HarJcness et Nichólson. On the Coniston. Group. Quart. Journ. Geol. Soc. Vol. 24. p. 296. 104 

 Nichólson. On the geological Distribution of Graptolites. Annals Mag. Nat. Hist. Vol. 4. Ser. 2. 



p. 347.-357. 105 



— On the Occurence of Ptilograptus etc. Annals Mag. Nat. Hist. ibid. p. 238. — 41. 106 



— On Helicograpsus. Ibid. p. 23. 107 

 J. Hall. Introduction to the Study of the Graptolitidae. Twentieth Annual Rep. on the State 



Cabinet. Albany. 108 

 Zeuschncr. Briefliche Mittheilung Uber Graptoliten aus Polnischem Úbergangsgebirge. Zeitschr. d. 



deut. geol. Ges. Bd. 20. p. 207. 109 



1869. W. H Baily. Notes on Graptolites and allied Fossils occuring in Ireland. Quart. Journ. Geol. 



Soc. London. Vol. 25. p. 158.— 162. 110 



J. Hopkinson. Journ. Quekett. Microscopical Club. Vol. 1. Nro. 6. 111* 



F. Heidenhayn. Uber graptolithenfuhrende Diluvial-Geschiebe der norddeutschen Ebene. Zeitschr. 



d. deut. geol. Oes. Vol. XXI. p. 143. 112 



Zeuschner. Uber den silurischen Thonschiefer von Zbrza bei Warschau. Ibid. Vol. 21. p. 569. 113 

 H. A. Nichólson. On sonie new species of Graptolites. Annals Magaz. Nátur. Hist, Ser. 4. 



Vol. IV. p. 231—242. 114 



1870. Ch, Lapworth. On the Lower Silurian Rocks of Galashiels. Geolog. Mag. p. 204 et 279. 115 a) 



— On the discovery of Upper Silurian Rocks in Roxbourgh and Dumfries. Report British Asso- 



ciation. p. 78. 115/i) 

 H. A. Xichohon. On the British Species of Didymograpsus. Ann. Mag. Nat. Hist. Ser. 4. Vol. 5. 



p. 337. Pl. VII. 116 

 J. Hopkinson. On the Structure and Aftinities of the genus Dicranograptus. Geol. Mag. Vol. VII. 



Nr. 8. 117 



Nichólson. On Climacograptus. Annals Mag. Nat. Hist, November. 118 



J. Barrande. Defense des Colonies. IV. 119 



D. Lucas Mallada. Sinopsis de las especies fossiles que se han encontrada en Espagna. 120 



1871. John Hopkinson. On a specimen of Diplograptus pristis with Reproductive Capsules. Ann. Mag. 



Nat, Hist. Vol. 7. Ser. 4. p. 317. 121 



(Voir: Journal of Quekett Microscopical Club. 1871. March.) 



— On Dicellograptus, a new Genus of Graptolites. Geol. Mag. Vol. 8. Nr. 1. 122 



— Notes on Diplograptus. Geol. Mag. 1871. Vol. 8. Nr. 7. p. 335. 123 



G. Linnarson. Oni nágra fórsteningar frám Sveriges och Norges Priniordialzon. Ófersigt Kongl. 



Vetenskaps Akaden^ens Fórhandlingar. Nr. 6. p. 789. 124 



B. Richter. Aus dem thuringischen Schiefergebiete. Zeitschr. der deutsch. geol. Gesellsch. Bd. 23. 125 

 Ch. Lapworth and J. Wilson. On the Silurian rocks of the counties of Roxburgh and Selkirk. 



Geol. Mag. Vol. 8. p. 456. 126 a) 



Ch. Lapworth. On the Graptolites of the Gala Group. Report, British Association. p. 104. 126/3) 



1872. H. AI. Nichólson, Migrations of Graptolites. Quart. Journ. Geol. Soc, London. Febr. Vol. 28. 



p. 185. et Geolog. Mag. Vol. IX. p. 232. 127 



J. Hopkinson. On the' Occurence of a reniarkable Group of Graptolites in the Arenig Rocks of 



St. Daviďs South Wales. Geol. Mag. p. 467. 128 



— On some new Species of Graptolites from the South of Scotland. Ibid. p. 501. 129 



