U.S. NATIONAL MUSEUM 



BULLETIN 294, PLATE 23 



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' 3 



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7 



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6 



5 



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4 



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12 



9 



Lateral Views of Caudal Vertebrae, I'SN.M 23635, Halicetus ignotus 



1 first caudal; 2, second caudal; 3, third caudal; 4, fourth caudal; 5, fifth caudal; 6, sixth caudal; 7 seventh caudal; 

 8, eighth caudal; 9, ninth caudal; 10, tenth caudal; 11, eleventh caudal;-12, twelfth caudal. 



