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II.—Armoured Palæozoic Sharks - 1. Ueber Flossenstacheln oder Ichthyodorulithen im Allgemeinen. By DrOtto Jaekel. Sitzungsb. Ges. naturf. Freunde, Berlin, 1890. pp. 119–131. - 2. Ueber Menaspis, nebst allgemeinen Bemerkungen ueber die systematische Stellung der Elasmobranchii. By DrOtto Jaekel. Ibid. 1891. pp. 115–131, with Plate. - 3. Oracanthus bochumensis, n.sp., ein Trachyacanthide des deutschen Kohlengebirges. By DrOtto Jaekel. Zeitschr. deutsch. geol. Ges. 1890. pp. 753–755, Pl. xxxvii.

Published online by Cambridge University Press:  01 May 2009

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Copyright © Cambridge University Press 1891

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References

page 425 note 1 Reis, O. M., Geognost. Jahrb. 1890, p. 30.Google Scholar