U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL 81 . ART. 13 PL. 4 





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17, IS. Ortliosplaiichniis arcticiis: 17. After Odhner. 190.5; 1,S, egg: (a) Cros.s section," (b) 

 lateral view, after Odhner, 190.'i. 

 li). (). fiiit(rriilu.s: After Odiiner, 1905. 



