n8 



The Irish Naturalist. 



June, 



wider, and higher) than the left, and rises about one quarter 

 of an inch above the level of the premaxilla of its own side. 

 These bones are behind the premaxillae, which curl round the 



Fig. I. Cranium of Mersoplodon Hectori from above. Fig. 2. Lateral view. 

 Fig. 3. From beneath. (The anterior fifth of the rostrum should have 

 been drawn with broken lines, to show the part that is wanting.) 

 Fig. 4. Cranium of Orca gladiator from above. Fig. 5. From beneath. 



convex anterior inner surface of the maxillae. The pterygoids 

 unite in the middle line and have the palates appearing in 

 front and internal to them, so that the anterior ends of the 



