XLII.—On the structure of Monograptus dubius (Suess)

References

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• The species was also shortly considered by Holm G. Gotlands Graptoliter Bihang Till K. Sv. Vet. Akad. Handl. Band 16, Afd. 1890 iv 7 161 161 Taft. 1, figs. 18–26. Stockholm
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• Cox , Ian . 1933 . On Climacograptus inuiti, sp. nov., and its Development . Geol. Mag. , lxx : 4 – 4 .
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 223 – 223 .
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• Cox , Ian . 1933 . On Climacograptus inuiti, sp. nov., and its Development . Geol. Mag. , lxx : 5 – 5 .
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 223 – 224 .
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 234 – 234 . describes four, and rarely five, threads for Monograptus sp.
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• Cox , Ian . 1933 . On Climacograptus inuiti, sp. nov., and its Development . Geol. Mag. , lxx : 4 – 4 . figs. 1–3, and Section 112, fig. 24 b.
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 233 – 233 .
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 234 – 234 .
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• Cf. Bulman O.M.B. Arkiv för Zoologi 24 A 8 & no. 9, many figures; Ian Cox, op. cit. fig. 6; P. Kraft, op. cit. Tafel xv. fig. 3.
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 226 – 226 . Ian Cox, op. cit. p. 9.
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• Kraft , P. 1926 . Ontogenetische Entwicklung und Biologie v. Diplograptus and Monographtus . Pal. Zeitschrift , vii : 236 – 236 . writes:—“But the eruption occurs in Monograptus between the bands, and they are not destroyed, but only pushed apart by the sprouting bud of the first theca” (Trans.). After a study of growth-bands in M. dubius the writer is unable to accept this view.
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