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. 2018 May 9;5(5):171669. doi: 10.1098/rsos.171669

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© 2018 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 5. — Line drawings of right humerus USNM 214625 (a) (Phocinae cf. Frisiphoca aberratum) (St Marys Formation of the Gay Head Greensands at Martha's Vineyard, Massachusetts) in lateral (a) view; and left ulna USNM 187410 (b,c) (Phocinae cf. Frisiphoca affine) (?Calvert Formation at Richmond, Virginia) in medial (b) and anterior (c) view. After figures from Ray [15]. USNM 214625 was considered ?Monatherium aberratum, and USNM 187410 was considered Monotherium? wymani. Broken and obliterated parts are indicated in grey. Scale bar equals 5 cm.