Bibliography and Index of the Sirenia and Desmostylia  

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"Humphreys, John"

x
 
 Humphreys, John (detail)
   
1908
The teeth of fossil fishes.
Proc. Roy. Soc. Med., Odont. Sect. 1(3): 7-16. 1 pl.
–P. 8: {"In Edentates we find the teeth of the sloths are formed of a dentine permeated by vascular canals, hence termed vaso-dentine. The megatherium, the gigantic extinct sloth of South America, exhibits this variety very clearly, in which the dentine and the cementum also were rich in looped blood-vessels which traversed the structures.
  "The teeth of the manatee possess similar characteristics...."}
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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