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