Bibliography and Index of the Sirenia and Desmostylia  

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"Marcus, H."

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 Marcus, H. (detail)
   
1921a
Über die Zahl und die Verschiebung von Zähnen besonders bei Manatus.
Arch. Entwicklungsmech. Organismen 47(4): 571-586. 4 tabs. 3 figs. Pls. 18-19. Apr. 18, 1921.
–Discusses the mode of tooth replacement in manatees in the light of a study of a series of T. senegalensis. Concludes that replacement is principally due to forward pressure from teeth erupting at the back of the toothrow, and that the number of teeth formed during the lifetime is at least 12-15 per jaw quadrant (274-286, pls. 18-19).
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 Marcus, H. (detail)
   
1921b
Über die Zähne und die Korrelation ihrer Zahl mit dem Alter, untersucht an Blindwühlen, Krokodilen und Seekühen. In: Deutsche Zahnheilkunde: Forschung und Praxis. Ein Band zu Ehren von O. Walkoff. Ed. 2. (Sonderheft von Deutsche Zahnheilkunde.)
Leipzig, Georg Thieme: 145-157. 6 figs. Pls. 5-6.
–First ed., 1920? Discusses the number of erupted and developing teeth in T. inunguis and T. senegalensis, and the process of tooth replacement (154-156).
Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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