354 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1956 



column by the aorta would come from use of the pectoral muscles in 

 reaching out and pulling toward him the foliage of trees composing 

 his diet, while propped in a relatively erect position by his massive 

 tail. 



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 1952. Les Mammiferes Pleistocenes de la Republique de l'Equateur. Soc. 

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1935. Saugetierfunde aus Venezuela und Trinidad. Schweiz. Palaeont. 

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