28 rnociD.T:. 



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

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

 nearly similar ; hut 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 Halicyon Richardi. 



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



inflexions of the lobe over the angle. 



c. End of the lower jaw of Pa(70»i?/s /a><jf/MS. The end of the jaw of 



Callocephalus vituUmis is somewhat similar. 



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



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



f. Lower edge of the lower jaw of Paijophilus Groenlandicus. The jaw 



of Pugomys footidus is somewhat similar, but much smaller. 



In CaUocephahts vHulimis and C. (Pac/onu/s) fcefidus, on the con- 



