1864. ] SPECIES OF GRAMPUS FROM TASMANTA. 
Upper surface of the adult skull; one-fourth natural size. 
The two skulls present considerable individual peculiarities ; but 
these all arise, I believe, from difference of age. One is perfectly 
adult ; the suture between the frontal and occipital bones is entirely 
obliterated ; the upper ends of the maxillaries are ankylosed to the 
