Vol. 56.] FOKMATION AND ITS GRAPTOLITE-FAUNA. 487 



discussed ; and above all, my gratitude to Prof. Lapworth, F.E.S. y 

 who has granted me every facility for my work, and has helped 

 me throughout with advice and sympathy. 



[Note. — All the figures of graptolites were drawn by me with the Parkes- 

 Lapworth microscope in the Research Section of the Geological Department, 

 Mason University College, Birmingham. Unless otherwise indicated, the 

 specimens figured are in my. own collection.] 



(C) Synonymy. 



MoNOGBAPTTTS DUBIUS (Suess). 



1850. Graptolithus colonus, Barrande, ' Graptolites de Boheme ' p. 43 & pi. ii r 

 fig. 5. 



1851. Gr. dubius, Suess, 'Ueber Bohmische Graptolitben ' Haidinger's Abhandl. 

 vol. iv, pt. iv, p. 115 & pi. ix, figs. 5 a-5 b. 



1876. Monograptus dubius, Lapworth, Geol. Mag. 1876, p. 33 & pi. xx, fig. 10. 



1878. M. dubius, Kayser, ' Die Fauna der altesten Devon-Ablagerungen de& 

 Harzes ' Abbandl. geol. Specialkarte von Preussen, vol. ii, pt. iv, p. 215 & pi. xxxi, 

 figs. 19-22. 



1880. M. serra, Hopkinson MS., Lapworth, ' New British Graptolites ' Ann. & Mag, 

 Nat. Hist. ser. 5, vol. v, pi. iv, figs. 6 c & 6 d. 



1883. M. dubius, Tullberg, 'Skanes Graptoliter' pt. ii, Sver. Geol. Undersokn. 

 ser. C, no. 55, p. 29 & pi. i, figs. 28-29 ; pi. ii, figs. 20-21. 



1890. M. dubius, Holm, ' Gotlands Graptoliter ' Bihang till K. Svenska Vet.-Akad, 

 Handling, vol. xvi, pt. iv, no. 7, pp. 16, 17 & pi. i, figs. 18-26. 



1893. M. dubius, Wiman, ' Ueber Monograptus ' Bull. Geol. Inst. Upsala, vol. i, 

 no. 2, p. 2 & pi. vii. 



MONOGBAPTUS TUMESCENS, sp. n0V. 



1868. Graptolites colonus, Nicholson, Quart. Journ. Geol. Soc. vol. xxiv, 

 pp. 540-41 & pi. xx, figs. 9-11. 



1889. Pristiograptus frequens? Jaekel, Zeitschr. d. Deutsch. Geol. Gesellsch, 

 vol. xli, p. 669 & pi. xxviii, figs. 1-2. 



Monogbaptus gotlandicus, Perner. 



1890. Monograptus sp., Holm, ' Gotlands Graptoliter ' p. 18 & pi. i, figs. 27-30. 

 1899. M. gothlandicus, Perner, ' Etudes sur les Graptolites de Boheme ' pt. iii,. 



sect, b, p. 12 & pi. xiv, fig. 22. 



Monogbaptus colonus (Barrande). 



1850. Graptolithus colonus, Barrande, 'Graptolites de Boheme' p. 42 & pi. ii,. 

 figs. 2-3 ; non 1, 4, 5. 



1851. Non Gr. colonus, Suess, ' Ueber Bohmische Graptolithen ' pp. 116-117 3 & 

 pi. viii, fig. 8. 



1852. ? Gr. colonus, Geinitz, 'Die Graptolithen... der Grauwackenformation in 

 Sachsen ' p. 38 & pi. ii, figs. 33-36. 



1868. Non Gr. colonus, Nicholson, Quart. Journ. Geol. Soc. vol. xxiv, p. 540-41 & 

 pi. xx, figs. 9-11. 



1869. ? Monograptus colonus, Heidenhain, Zeitschr. d. Deutsch. Geol. Gesellsch. 

 vol. xxi, p. 146. 



1876. Non M. colonus, Lapworth, Geol. Mag. p. 505 & pi. xx, figs. 9 a-c. 



1876. ?Non M. colonus, Haupt, ' Die Fauna des Graptolithengesteines ' Neues 

 Lausitz. Mag. vol. liv, pp. 19-20. 



1878. ? M. colonus, Kayser, 'Die Fauna der altesten Devon-Ablagerungen des 

 Harzes ' pi. xxxi, figs. 17 & 18. 



1880. Non M. colonus, Lapworth, Ann. & Mag. Nat. Hist. ser. 5, vol. v, p. 153 & 

 pi. iv, figs. 3 a-3 c. 



1880. M. Rcemeri, Lapworth, ibid. p. 151 & pi. iv, figs. 5 a-5 c. 



1883. M. colonus, Tullberg, ' Skanes Graptoliter ' pi. i, figs. 22 & 23. 



