28 



PHOcroa:. 



nearly perpendicularly, with a notch at the hinder end, as shown in 

 /, fig. 9. In Phoca harhata the form of the lower jaw and ramus is 

 nearly similar ; but instead of a notch near the angle, the inner edge 

 is produced inwards into a rounded lobe (6, fig. 9 ; and see Cat. Seals 

 B. M. p. 27. f. 9). 



Fig- 9- 



a. Skull of HaUq/on Richardi. 



b. End of lower jaw of Phoca barhata, to show the dilatations and 



inflexions of the lobe over the angle. 



c. End of the lower ji?sv oiPagomys foetidus. The end of the jaw of 



Callocephalus mtulinus is somewnat similar. 



d. Lower edge of the lower jaw of Halicyon Richardi. 



e. Lower edge of the lower jaw of Phoca barbata. 



f. Lower edge of the lower j aw of Pagophilus Orcenlandicits. The j aw 



of Pagomys fmtidus is somewhat similar, but much smaller." 



In Callocephalus vitulinus and C. (^Pagomys) fcetidus, on the con- 



