PROC. U. S NAT. MUS— KELLOGG 



7 



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Pelodelphis gracilis, new genus, new species (referred specimen, USNM 20732): 1, anterior 

 view, fourth dorsal; 2, same, eighth dorsal; 3, same, sixth caudal; 4, lateral view, fourth 

 dorsal; 5, same, eighth dorsal; 6, same, sixth caudal; 7, posterior view, fourth dorsal; 8, 

 same, eighth dorsal; 9, same, sixth caudal. 



