6 
1868. De llouvillc. Compte rendu de la course à Roujan-Cabiières. Bull. Soc. géol. de France. Ser. II. 
T. 25. 1868. p. !)59. etc. 100 
W. Carrut/ters. Révision of Britisli Graptolitidae. Geol. Mag. Vol. V. Nr. 44. et 45. 101 
II. A. NirhoLson. The Graptolites of the Skiddaw-Series. Quart. Jouru. 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 
B. Harliness et Nicholson. On the Coniston. Group. Quart. Journ. Geol. Soc. Vol. 24. p. 296. 104 
Nicholson. 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 lîep. on the State 
Cal)inet. Albany. lOg 
Zeuschner. Brietliche Mittheilung iiber Graptoliten aus rolnischeni Ubergangsgebirge. Zeitsclir. d. 
deut. geol. Ges. Bd. 20. p. 207. - - ^^^^^ 
1869. W. H. Buily. Notes on Graptolites and allied Fossils occuring in Ireland. Quart. Journ. Geol. 
Soc. London. Vol. 25. p. 158. — 162. HO 
J. HopUnson. Journ. Quekett. Microscopical Club. Vol. 1. Nro. 6. 111* 
F. Ileidenhaiin. Uber graptolithenfiUirende Diluvial-Geschiebe der norddeutschen Fl)ene. Zeitschr. 
d. deut. geol. Ges. Vol. XXI. p. 143. 112 
Zeuschner. Uber den silurischen Thonschiefer von Zl)rza bei Warschau. Ibid. ^'ol. 21. p. 569. 113 
II. A. Nicholson. On some new species of Graptolites. Annals Magaz. Natur. Hist. Ser. 4. 
Vol. IV. p. 231—242. 114 
1870. Ch. Lapii-ortlt. On the Lower Silurian Rocks of Galashiels. (ieolog. ]\Iag. p. 204 et 279. 115 «) 
— On the discovery of Upper Silurian Rocks in Roxbourgh and Dunifries. Report British Asso- 
ciation, p. 78. 115/î) 
//. A. Nicholson. On the British Species of Didymograpsus. Ann. Mag. Kat. Hist. Ser. 4. Vol. 5. 
p. 337. Pl. VII. ' 116 
J. llopkinson. On the Structure and Affinities of the genus Dicranograptus. Geol. Mag. \o\. VII. 
Nr. 8. , ^ ^ 117 
Nicholson. On Climacograptus. Annals Mag. Nat. Hist. November. 118 
J. Barrundc. Défense des Colonies. IV. 119 
I). Lucas Mallada. Sinopsis de las especies fossiles que se han encontrada en Espagna. 120 
1871. John llopkinson. On a spécimen of Diplograptus pristis with Reproductive Capsules. Ann. Mag. 
Nat. Hist. Vol. 7. Ser. 4. p. 317. 121 
(Voir: Journal of Quekett Microscopical Club. 1871. Mardi.) 
— On Dicellograptus, a new Genus of Graptolites. Geol. Mag. Vol. 8. Nr. 1. 122 
— Notçs on Diplograptus. Geol. Mag. 1871. Vol. 8. Nr. 7. p. 335. 123 
G. Linnarson. Om nâgi-a fôrsteningar frâm Sveriges och Norges Primordialzon. (")fersigt Kongl. 
A'etenskaps Akademiens Forhandlingar. Nr. 6. p. 789. 124 
B. Bichter. Aus dem thûringischen Schiefergebiete. Zeitschr. der deutsch. geol. Gesellsch. Bd. 23. 125 
Ch. Lapivorth and J. Wilson. On the Silurian rocks of the counties of Roxburgh and Selkirk. 
Geol. Mag. A'ol. 8. p. 456. 126 k) 
Ch. Lapicorth. On the Graptolites of the Gala Group. Rejjort, British Association, p. 104. 126^) 
1872. H. Al. Nicholson. Migrations of Graptolites. Quart. Journ. Geol. Soc. London. Febr. Vol. 28. 
p. 185. et Geolog. Mag. Vol. IX. p. 232. 127 
J. HopJcinson. On the Occurence of a remarkal)le Group of Graptolites in the Arenig Rocks of 
St. David's South Wales. Geol. Mag. p. 467. 128 
— On some new Species of Graptolites from the South of Scotland. Ibid. p. 501. 129 
