U.S. NATIONAL MUSEUM 



BULLETIN 294, PLATE S 



Lateral Views of Dorsal Vertebrae, USNM 23794, Thinocetus arthritus 



1, second dorsal; 2, third dorsal; 3, fourth dorsal; 4, fifth dorsal; 5, sixth dorsal; 6, seventh dorsal; 7, eighth dorsal; 

 8, ninth dorsal; 9, tenth dorsal; 10, eleventh dorsal; 11, twelfth dorsal. 



