THE DELPHINOIDEA. 



841 



superior angle of which the spiracle is placed. The teeth 

 become fully developed only in the lower jaw. The cranial 

 basin is immense, and is filled by a loose connective tissue, in 

 which the peculiar fat known as spermaceti is contained. Am- 

 bergris is a sort of bezoar, found in the alimentary canal of tho 

 Cachalot, and seemingly derived from the fatty matter con- 



S^G. 106. TTpper (A), under (B), and lateral (C) views of the skull of a fretjil Cachalot 



iVhysete^). — The nasal hones arc not n'presented in the upper view, and the hinder ead 

 of the jugal Is displaced from its natural connectiou with the squamosal in (C), 



